ℝenesse is Ayiesha's sort of mentor, helping her travel into books and training her for that responsibility. Renesse has a human disguise they put on all the time. With only a selected few able to see their true form (Like Ayiesha).

When they are not in the library, they are most likely in their coffee shop serving coffee and whatnot in disguise. Being a coffee bartender has it's perks however, Renesse could slip spells in the coffee or inscribe talisman symbols with no one knowing (except for rare cases).

(still a wip...!)