▪︎Never ever refer to them as a girl or as Stella. They try to distance themselves from that identity greatly.
▪︎Interested in stars/ space. Which is the reason why they called themselves Chara. Even though they dislike their original name, they kept the star references.
▪︎They felt very alone throughout their whole childhood. Chara was used to being self-sufficient and was distanced from their peers. They tried to make friends but struggled greatly. As for family, they always felt like an oddball compared to everyone else they lived with.
▪︎Major oldest sibling syndrome. They were used to taking care of others and taking over responsibility. Wasn't so much "independence" for them, but they felt obligated to do it.
▪︎The pressure to be someone else for others' approval was too much for them, so they climbed the mountain. They don't talk about it much, just calling it "unhappy reasons"
Living with the Dreamurrs:
▪︎Chara was founded by Asriel, like Undertale Canon.
▪︎For the first time, they felt accepted and were adopted easily.
▪︎They lived in the Capitol with the royal family but did walk around the underground. They always felt it was ironic that they got along better with monsters than the humans they've known for years.
▪︎They were close pair with Asriel. The two were always together.
▪︎The idea was put in their head when learning about how powerful human SOULs are. They loved the monsters and wanted them to be happy so death was a small sacrifice to them.
▪︎They didn't think about killing the humans right away. No matter how bad they knew their life was, they didn't see a point in revenge. It was only when they saw Asriel being hurt by them. The plan ultimately fails regardless.
Their SOUL attached itself to each human when they fell down, but once they died, Chara was moved back to the flowebed they were buried. From instinct, they tried to guide each human in hopes that one of them would complete what they couldn't.