Theo is very quiet; he prefers to sit and watch than do and act. He is both honest and sincere, although he uses a lot of double-meaning phrases in his speech. His vernacular reflects the vocabulary of a well-read person.
The clothes on his back, the feet in his shoes, and the brain in his head.
Theo's family comes from Sweden. He is bilingual (French and English). There is nothing particularly striking about his childhood or relatives. He came to the school out of his own discovery (he had found information about them before they had contacted him), and spends most of his time in the library or his dormitory. Theo has been at the school for two years (he is currently sixteen) and has been passing with decent grades (they aren't particularly remarkable, as he is not a fan of homework).