Hoshino Sora

Hoshino sora (星野空)

Being transformed into a Heartless
In episode 1, Sora was being bullied by Fujikawa Olivia and her friends which caused Sora to run away and cry. While sitting on a bench, Iris sees her and asks her what's wrong but just as Sora was about to reply, Noir appears and transforms her into a Heartless.

Personality
Sora is a sweet and angelic girl who loves video games and writing stories. Additionally, she is very emotional as she suffers from autism.

Relationships

 * Hanayama Iris - Iris is Sora's childhood friend and have maintained a strong friendship ever since. Sora admires Iris' brave nature and is inspired by Iris.
 * Mikan'boshi Alani - As well as Iris, Alani is also Sora's childhood friend. As Alani knows what it is like to be bullied, she often encourages Sora to stand up to bullies like Olivia and her friends.
 * Hoshino Alex - Sora's twin brother and the exact opposite of Sora. Alex is way more mischievous than Sora and gets into trouble way more than her.

Etymology
Hoshino (星野)

Sora (空)

Therefore, her name translates to "Star Field Sky" or "Sky Star Field"

Trivia

 * Sora shares many similarities with Nanase Yui from Go! Princess Pretty Cure, these are:
 * They both get transformed into the monster of the day in the first episode of their respective series
 * They both dream to become an author when they're older (Yui dreams to become a picture book author; Sora dreams to become a novel author)
 * They both wear glasses
 * They are both best friends with the lead cure of their respective series