Canonically she's just quiet enough to appear and scare the shit out of her brother and calls it "older sister magic".
So why not make it as long as SHE doesn't make noise she can make herself invisible to other people? As in as long as she's moving in a way without speaking or doing something like opening bags of chips/dropping something/etc she can go invisible) some leeway given to opening/closing doors but only for funny. If she's slamming doors ofc that breaks it.
It's not meant for Real stealth so much as OOC funny so probably a timelimit of 10min-1 hr? Given I'd play her not realizing it's an actual blessing until the ship it's not something that's been a long time thing.
OLDER SISTER MAGIC
So why not make it as long as SHE doesn't make noise she can make herself invisible to other people? As in as long as she's moving in a way without speaking or doing something like opening bags of chips/dropping something/etc she can go invisible) some leeway given to opening/closing doors but only for funny. If she's slamming doors ofc that breaks it.
It's not meant for Real stealth so much as OOC funny so probably a timelimit of 10min-1 hr? Given I'd play her not realizing it's an actual blessing until the ship it's not something that's been a long time thing.