for this fine lady right here, brigantia/briony. i don't mind even slightly what gender either master or apprentice are, but there are a few specifics i'd like to note for the master in particular. briony is a rather tempestuous lady who will sharply go from being a rather calm (even caring, at times) woman to being rather more aggressive and short tempered, so the master would have to be patient enough to deal with this kind of stuff. the master is gifted with indestructibility, which basically means that the only way the master can really be harmed is by old age tbh. given that briony is a goddess of warriors and what have you, someone with a fairly tough military/police/that sort of thing background would be best suited to being her master, and would work as her second in command at the security firm.
the apprentice is more of a free rein! i can't think of any specific personality points that might come in handy, but again some kind of background to do with the military/police/etc might be handy, and they would work in some low level section of the security firm. their gift is PSYCHIC TRACKING which is basically being able to track just about anyone in the world, if they put their mind to it (with the exception of briony herself, since she likes to give her carers the slip and avoid them whenever possible).
WANTED : EVERYONE come here
WANTED, ONE MASTER AND ONE APPRENTICE
SO YEAH there we have it
i talk too much