SOURCE : Wiki
=Anna's name means "full of grace." Ironically, =Anna is more bubbly and daring than graceful.
=Anna, being the younger sister, has two braids in her hair; while Elsa, the oldest, has one.
=Anna tends to touch her hair whenever she gets nervous.
=Anna is the 12th member in the official line-up, and is the third freckled and third computer animated princess after Rapunzel and Merida.
=She was the third to have her movie be released in Disney Digital 3D.
=Anna is the third Disney princess to have her movie rated PG after Merida from Brave and Rapunzel from Tangled.
=Anna is the fourth Disney Princess to have blue eyes (the first three being Cinderella, Ariel and Merida).
=Anna is the third Disney Princess to have any siblings (first is Ariel, second is Merida), and the first to only have one. She also will be the second Disney Princess to be the youngest sibling, Ariel being the first. Anna will also be the first ever Disney Princess to have a fellow Disney Princess as a sister.
Anna is the sixth Disney Princess to be seen in childhood, the first five being Cinderella, Ariel, Tiana, Rapunzel and Merida. Then again, she could tie with Elsa.
Anna is the third Disney Princess to wear boots, the first being Belle in Beauty and the Beast: The Enchanted Christmas and the second being Pocahontas in her sequel film, as well as in her redesign.
Anna is the second Disney Princess with strawberry-blonde hair and to have pigtail braids, both first being Cinderella.
Anna is the fourth Princess to have a green dress. The first was Belle, second was Mulan and third was Tiana. Zara also wears one, though she isn't an official princess.
Anna is the second Disney Princess after Rapunzel to have a hair color change.
Anna's name is pronounced as "Ah-na", as she is Norwegian.
Since the Disney Princesses were designed to have all the princesses unaware of each other's presence, Elsa and Anna are the first and second of all the Disney Princesses to know of each other (second and third if one counts Rapunzel's cameo in the beginning of Frozen). This is especially so as they are sisters.
Rapunzel, Anna and Elsa are the only princesses that are playable characters in Disney INFINITY.
Coincidentally, all three appear in the same film (the first as a cameo near the beginning as one of the attendees to the last's coronation).
Anna is the first Disney Princess to formerly have a villain as a love interest (Hans in this case).
Anna and Elsa are the third and fourth Disney Princesses to be orphans the first two being Snow White and Cinderella.
Anna and Elsa are the fifth and sixth Disney Princesses to be seen as kids in their feature films the first four being Cinderella, Tiana, Rapunzel and Merida.
Anna is so far the only Disney Princess to share a duet with the villain.
Anna seems to share some similarities with Merida.
Both have a fearless personality.
Both set out to make right a mistake (Merida turned her mother into a bear and Anna accidentally pushed her sister which caused her to freeze the summer).
Both have blue eyes.
Neither are weak and they both know how to defend themselves.
Both had desire to not be locked up in their castle and enjoyed being outside.
Both have some growing up to do in their respective films.
They both have biological siblings.
Anna is also the second Disney Princess that does not have a love song and a duet with her love interest, the first being Mulan.
Anna also has several strong similarities to Rapunzel:
Both have dreams of being outside their home. Anna, as depicted in "For the First Time in Forever", sings about what she has never went though before and finding true love. Rapunzel wished to see the floating lanterns, and after learning of her identity, wished to be free, which eventually happened.
Both princesses are 18 years old, as Anna is 18 according to Jennifer Lee and the fact that Anna is 3 years younger than her sister Elsa.
Both were locked up indoors: Anna in a castle due to the gates being closed because her parents wanted to keep her sister Elsa and her icy powers hidden. Rapunzel in a tower.
During the "For the First Time in Forever" sequence when Anna dresses herself with a curtain, she hits her face just like how Rapunzel hit herself with a frying pan.
Both have their hair color changed (Anna's hair turns white, Rapunzel's hair turns brunette). However, Rapunzel's hair had changed to its natural color while Anna's changed into a different color.
Anna is similar to Mulan as both are clumsy, outspoken and awkward. They are also fearless and love their family.
Anna is similar to Fix-It Felix since they both traveled with someone to find a sibling figure and prevent a catastrophe in their land (Felix traveled with Calhoun to find Ralph and stop the Cy-Bug invasion while Anna traveled with Kristoff to find Elsa and stop the eternal winter) also they both fall in love with the person they traveled with.
Anna is the second Disney Princess to almost be attacked by wolves, after Belle.
Some of Anna's official artwork are actually modified artwork of Tiana's.
Anna is the princess that's least likely to become queen.
Anna is the second princess to have two love interests, the first being Pocahontas.
Anna is mostly seen wearing green and magenta, while Elsa wears blue. Green and magenta represent spring and summer as well as her cheerful and optimistic personality.
Anna is the third Disney protagonist to call out the main villain, whom they had initially loved and trusted throughout the film, for being the very thing they had called evil. The first is Quasimodo from The Hunchback of Notre Dame, the second is Rapunzel from Tangled.
Although Anna has strawberry-blonde hair and blue eyes, due to lighting effects, her irises can sometimes be seen with a light green tinge and her hair sometimes appears red.
Anna is the second Disney Princess to die and later return to life in a film, the first being Snow White. But as for Aurora, her curse never took her life, but only made her sleep.
Anna is the second Disney heroine to turn to crystal, after Kida.
Anna is similar to Tarzan since both of them trusted the main antagonist and both are locked to prevent them from stopping his evil plans (Clayton locked Tarzan in the ship while Hans locked Anna in the Castle). In addition to this, Anna and Tarzan are both also freed from their confinements by their sidekicks (Terk and Tantor freed Tarzan and Olaf freed Anna).
Interestingly, Frozen and Tarzan were both directed by Chris Buck.
Anna is slightly similar to Kenai from Brother Bear. Both are headstrong and didn't obey their siblings orders, both of their films take place in a snowy place and both of their films shows the important of (Brotherhood for Brother Bear and Sisterhood for Frozen). But unlike Kenai, Anna is not very stubborn.
Anna is similar to Giselle from Enchanted as they both had fallen in love with the prince, and after a disaster, has to spend time with someone else, and finds out at the end that her true love is actually not the prince, but the person whom she spent more time with. Both heroines also have a duet with the prince, and want to marry a day after meeting each other. Although Anna can be seen as different from Giselle since her love for Hans can be argued as not being true love, and she was desperate to not be alone in the castle anymore.
Anna is also similar to Nita of Brother Bear 2. Both of them are engaged to a man they didn't know very well. (Atka for Nita and Hans for Anna). They traveled with someone to fulfill something (Nita goes with Kenai to burn the amulet and break their bond while Anna goes with Kristoff to find Elsa and bring back summer). Also both of their former fiancés turn out to be the main antagonists of their respective films.
Anna is the first princess to be revived with sibling affection and not a love kiss.
She uses Kristoff's lute as a weapon when she hit the wolf accidentally. She is the 4th Disney Princess to have a unique weapon after Mulan with her sword, Rapunzel with her frying pan and Merida with her bow and arrow.
While Anna is a princess who had two love interests, it can be noted that her love for Hans was more out of desperation and a naive infatuation, and her only true love was Kristoff all along.
The two parts of Anna's body that Elsa accidentally hurt with her ice powers, her head and her heart, mirror the two parts of Kai's body that were hit by the broken shards of the Devil's mirror in the original "Snow Queen" fairy tale: the eye, distorting the way he see things, and the heart, making him resentful to others. Ironically, Elsa takes on Kai's role in the film.
There was a deleted song entitled "More Than Just The Spare", which would have explained that Anna is feeling down because she was just a useless spare and Elsa is the heir who was meant to rule over Arendelle. It was later replaced by "For the First Time in Forever" since it does not fit in the story. But during her first meeting with Hans she said she's only a Just and also during the coronation she's a bit shy to stand in front of Elsa because she's not the heir, which explains a lot. Another reason why they deleted it because this personality would make Anna become more like Hans who is insecure to his older brothers.
Anna is the third Disney Princess whom the villain wants to marry. The first is Belle followed by Jasmine.
Like the Beast, Anna sacrifices herself and is restored by love. Also, their deaths and resurrections are very similar to each other.
The design of Anna's hair streak is similar to Queen Elinor's hair streak. However, Anna's was due to Elsa striking her and wasn't natural like Elinor's.
Anna has a few similarities to Ariel.
Both their films are based on fairy tales by Hans Christian Andersen.
Both are fun-loving, cheerful and brave.
Both want to marry a prince they just met. Coincidentally, both also fell in love largely due to perceived isolation regarding their relatives (in Ariel's case, that her father was unwilling to even consider that humanity wasn't that bad, and in Anna's case, due to Elsa shutting her out of her life).
Both become victims of magic gone wrong.
Anna's dress is very similar to the one Ariel wears when she goes on a date with Prince Eric.
On a minor note, both their names begin with the letter A.
Anna has some similarities with Belle.
Both are beautiful, loving, kind and strong-willed.
Both have a handsome enemy who wants to marry them for selfish reasons and don't really love the girl at all. As a possible reference, because Anna is actually attracted to this enemy she almost quotes the three blondes who are actually interested in Belle's enemy. While they say, "she's crazy" followed by "he's gorgeous", Anna says "I'm awkward" followed by "you're gorgeous."
When someone close to them is exposed (Beast and Elsa) by themselves with unintended results, they both plead that he/she is not a monster, despite the crowds' fears of him/her.
Both are attacked by wolves.
Both are befriended by talking magical creatures (The enchanted objects, Olaf)
Both are locked up by the villain, but are rescued by their magical friend.
Albeit unintentionally, both nearly got their close loved ones killed due to the main villain's machinations.
Belle nearly got Beast and his enchanted servants killed as a result of her exposing the Beast's existence to the villagers when trying to save her father after Gaston riled up the already congregated mob's emotions.
Anna, along with causing Elsa's powers to be exposed to the public, during her search for Elsa, unknowingly placed her in grave danger to Hans due to her relationship with him.
Anna is also similar to Jasmine in a few ways.
Both are princesses, mostly cooped up in their castles.
Both have an enemy who only wants to marry them to become king (Jafar, Hans).
Both fall in love with a young man who is not royalty (Aladdin, Kristoff) and has an animal for a best friend (Abu, Sven).
Although Elsa is based on Kai, Anna receives ice skates from Elsa, mirroring how Kai also received ice skates from the Snow Queen.
Anna also has a few similarities with Pinocchio.
Both are cheerful, friendly and naive.
Both have a loyal sidekick (Jiminy for Pinocchio, Olaf for Anna).
Both know a powerful mystic (The Blue Fairy for Pinocchio, Pabbie for Anna).
Both their naivety led to trusting a villain who didn't appear evil at first, but later revealed their true natures to them and locked them up (Stromboli for Pinocchio, Hans for Anna).
Both sacrificed themselves to save a beloved family member and died in the process.
Both were miraculously resurrected because of their sacrifice of love.
Anna is also similar with Flynn Rider but there is only two similarities between the two.
Both were killed near the ending of the films they appear.
Anna became a frozen statue.
Flynn was stabbed.
Both were brought back to life by their loved ones (Elsa for Anna and Rapunzel for Flynn)
Eventually, Flynn made a cameo with Rapunzel in Frozen at Elsa's coronation near the start of the film, so that could mean he knew them like his wife.
It is unknown as to how Anna paid for the items she bought from Trader Oaken since it is unlikely that she had carried money with her. However, it is possible that she sold off her green dress to pay for the items she bought, which is supported by the fact that her ballroom dress hasn't been seen since. But she may also sold her greenish-gold pendant that has the Arendelle's symbol which is actually expensive because it is a jewelry worn by a Princess.