Third Sunlight Sister Headcanons
her given name is Sori (소리), a name meaning "sound, voice"
it can also be written with the hanja for "laughter" which I felt was fitting
her stage name is Zhinü, the name of a Chinese goddess of the constellation Vega, (aka the Weaver Girl of The Cowherd and the Weaver Girl folktale fame)
identifies with her stage name in a similar way that a drag queen identifies with their stage name (on-stage, she's Zhinü, off-stage, she's Sori)
she does not know that Rumi is half demon, Celine was too afraid of her reaction (is that.......generational cycles? In my headcanons? It's more likely than you think.)
I legitimately do not know how she would've reacted to finding out
Mi-Yeong had it in her will that Celine and Sori would have joint custody of Rumi, Celine overrode that when she took in Rumi
Sori knows Celine hasn't been handling Mi-Yeong's death well, but Celine pushes her away everytime she asks
she's basically Rumi's distant auntie, that she only sees every once in a while
she has become responsible for maintaining the Honmoon while Celine is raising Rumi/building Huntrix
launched a solo career to cover this (imagine a mix of HyunA, Lee Hyori, and CL)
her grandfather was an African-American soldier stationed at a military base in Seoul after the Korean War
and her grandmother was a member of one of the proto-rock bands that sprang up around the military bases
her entire family is involved in music in some way, shape, or form
has the most functional family out of the Sunlight Sisters (tho that's not saying much)
not an only child, she only has brothers tho (either the middle or the youngest)
was the Sunlight Sisters' proto-choreographer and secondary lyricist
her weapon is a pyeongon, a large flail used by martial artists from at least the 1700s onward (live demonstration of a pyeongon can be found here)