ラジエル

She is the owner of the Sefer Raziel, a grimoire containing all the knowledge of the cosmos since Creation. Following Adam's exile from Paradise, she entrusted him with the book to grant him wisdom.

She loves books. Whether it's a hardcover or a paperback edition, an e-book or mere scrawls on a piece of parchment, she loves them all unconditionally. The tablet PC she cradles in her right hand is filled with myriads of e-books, including many files of dubious origins, some of which are hidden, and even password-protected.

...She is unable to recall a portion of her memories; it is unclear whether this fact leaves her genuinely unconcerned, or if she's simply sweeping the problem under the rug.

Deliberately playing the role of an airhead character, deep inside she hides her true nature of, wel... a genuine airhead.