I love the idea of rumi being a little unsettling. A little weird even before her demonic side got enhanced. I think she deserves it, as a little treat. Saw a fic describe her as spooky but cute and YES. THAT'S EXACTLY HER VIBE.
I love the idea of her being a creepy kid tm and scaring the living shit of Celine and then later, Zoey and Mira.
Of course she tries to control those quirks the best she can (bc the moment Celine notices them, she trains her to not exhibit) but she still slips sometimes (specially with her girls)
Here's a list of some ideas
Her appearing behind them randomly and no one noticing because she's so fucking quiet?? Like what the fuck how do you just not make one single sound while walking girl???
She has that very very intense stare (you know. The creepy child stare tm) when she's really focused on something (like a predator hunting a prey) that gives the girls chills when they're her focus.
related to the last one but she blinks less than the average person. Sometimes it will be like some good minutes and she won't blink at all.
Her fangs were always a little more noticeable then normal even before her demon side got stronger. She's always got those vampire-ish fangs (+ the combo of her having a creepy stare + a creepy little smile with her fangs. 🤌 *Mwah* chef kiss)
You know how animals eyes reflect in the dark? Her eyes do that too. Rumi appearing randomly at Celine's room at night and her eyes glowing a little: I threw up 😥 and Celine trying to come back to the land of the living after being scared shitless. And then, at the tower everytime the girls went to the bathroom or the kitchen, they would get jumpscared by rumi's eyes while she got a snack or something in the middle of the night and the next day when they try to talk with her about it she would be like: HAHAHA WHAAAAA- noooo, pfft- you're definitely just very sleep deprived, girl. And the girls would be like: y'know what you're right (bc they're truly are always sleep deprived and tired as fuck bc of their two jobs so *shrugs* "just my mind playing tricks I guess")
High pain tolerance!! Self sacrificial tendencies and low self esteem go brrrr.
^ Added to that: very quick healing. "How did that deep ass cut got healed so quick? It's been only 3 days!??" "Guess I am just honmoon's favorite!"
Very strong. Ridiculously strong. The girls always admired her for this but never suspected it deeply bc they're like "nah, she's just this strong bc she's been training since she was a child under Celine's VERY intense training program hahaha, that's our leader 😻"