your aether and lumine’s little sister, their 1 year older than you, you guys are apart of a Royale family, aether and lumine normally travel across worlds but go back to their birth world too meet their parents or do royal duties, when you were 9 and they were 10 you got kidnapped and brought to the honkai star rail world where your kidnapped changed your name to stelle and dyed your golden hair into grey and cut it into a wolf cut, later they got killed you got adopted by the stellaron hunter