I know it sounds stupid to say "Happy Birthday" to a video game character, but I'm gonna do it anyway because I'm bored and it's like twenty to 1 in the morning, hence my boredom.
Anyway, Cynthia, (or
Shinshia as she is known in the Japanese version of the game) one of the many characters in Fire Emblem: Awakening has her birthday today, May 14th (5/14)! How do I know this? I got bored and went to the Barracks because it was flashing and it said that there was a birthday event! Turns out, it was Cynthia's! Cynthia is Sumia's daughter in Fire Emblem: Awakening, her father can be any of the following: Avatar (male), Chrom, Fredrick, Gaius, Henry. If Sumia marries Chrom, Cynthia will be Lucina's sister, but if Sumia marries the male Avatar, then she will be Morgan's sister. Otherwise, like the other kids, she will be an only child.
In my game, I had SumiaxHenry, hence she has white hair like her father, but no matter whom her father is, she is suppose to act like her mother, hence she is clumsy but that's part of her charm and cuteness. I also had her be married to Brandy. They seem like a sweet couple and she's really cutesy compared to Brandy. That might be why I had them paired together. Anyway, Cynthia first starts off as a Pegasus Knight, but you can change her class (like anyone else's class) to whatever is on the list.
She sorta reminds me of America from Hetalia. She always tries to be a hero and is obsessed with trying to be one. She's a very sweet girl, so if you choose her as your wife in the game instead of her father, YOU'D BETTER TREAT HER RIGHT! ><
Anyway, now for some trivia about her:
Cynthia is Sumia's daughter from the future. She wears Sumia's ring, one of three mementos that Sumia left behind. The second is a spear head which was supposed to be the tip of a lance that Cynthia and Sumia were going to make before Sumia's untimely death in the future. The third and final memento is her pegasus, which her mother sent to protect her once she died. She speaks nonsense in her sleep. She is part of the Justice Cabal along with Owain and Morgan.
After arriving in the current timeline, Cynthia searched for Chrom's army. On the way she bumped into a man claiming to be Chrom and instantly believed him and began to follow his orders and aided him as much as she could. However, on a fateful day she met the real Chrom who was accompanied by her mother. Upon finding out about the ruse, Cynthia teamed up with Chrom's army and defeated the impostor. Finally reunited with her mother and the real Chrom, Cynthia joins Chrom's army. Alternatively, if Chrom married Sumia, Cynthia will call Ruger "Father." On the battlefield, should Chrom talk to her, Cynthia will discover that he is the real Chrom, but is still doubtful. She tells him to call her his "pega-pony princess" like he supposedly did in her time in order for her to believe him. Much to his embarrassment, Chrom nevertheless calls her so, and she defects to her father's army.
After the war, Cynthia continued her quest to become a hero. Sadly, she was remembered humorously rather than heroically. Still she was well loved by all for trying.
In her support with her mother, she dreams of becoming a part of the Ylissean Pegasus Squad; however, her mother says she is not ready to become one yet, despite her excellent fighting abilities. By their final support, Cynthia realizes that she spent so much time improving herself that she neglected her pegasus, and vows to take better care of her mount. In her support with her father, she spends as much time as she can trying to do fun stuff with him. Eventually her father gets exasperated with her constant requests to do stuff together and wants space. Cynthia tells him that she is spending as much time with him because she never got to, and once her present version is born, she does not want to take any time away from the baby for her own needs, which touches her father's feelings.
Cynthia has a bright and energetic personality. She admires heroes and studies dramatic entrances to become a hero herself. Unfortunately, she inherited her mother's clumsiness and her entrances and pursuits to become a hero go differently than she plans. She also enjoys doing flower fortunes like her mother. She has a strong sense of justice, though it can often become misguided, but nevertheless, she seeks to do the right thing. She highly admires her mother and father, both of whom she seeks to be like.
It is revealed in the Harvest of Bonds DLC conversation with Severa that she used to be really girly as a child, but she played more with boys when her personality changed drastically having transformed overnight according to Severa, after Sumia was killed by the Risen. Cynthia felt that doing all that girly stuff was pointless, that she no longer cared about being pretty and she says that she is no good at doing all that girly stuff and is glad she has Severa for that. Cynthia reveals she wanted to become a hero to avenge her mother.
Like Cordelia and Sumia, she and Severa have been friends since they were children.
Her birthday is May 14th.

Cynthia's birthday is the same day that
Fire Emblem: Genealogy of the Holy War was first released in Japan.

Incidentally,
Ribald Tales of the Faith War is one of her mother's favorite novels.

In her non-sibling support with Lucina, Cynthia talks about the Whitewings and their famed Triangle Attack.

Cynthia shares her English voice actress, Stacy Okada, with Say'ri.

One of Cynthia's lines, "Look upon my might, ye wicked, and despair!" is likely a reference to the Percy Shelley poem "Ozymandias", in which a statue's inscription invites the reader to "Look upon my works, ye mighty, and despair!"

Cynthia's official artwork depicts her wielding a Silver Lance.

Her concept art pose seems to echo that of Kamen Rider 1, even mimicking the same pose, but not the same posture. However, a common pose is used with most Tokusatsu-esque heroes.
Yes, I did get all of the trivia stuff from the Fire Emblem Wiki, so shut up about it, haters! >:I