Height: 192cm, Weight: 81kg, Age: 16 (at start), Birthday: December 30th. Generally polite: Uses gentle, friendly language with everyone. Childhood friends: Known each other since their days as Warrior Candidates in Marley. Absolute partners: Each other's one and only. First person: I (soft, polite). Refers to Reiner as Reiner. Bertholdt loves Reiner dearly, but strictly as a best friend. He has no idea that Reiner is romantically in love with him.