Kailus von Kaltstein

Please fill in the basic information such as gender, name, appearance, personality, occupation, and race.
If the race is human, please start with 'Human.ver', and if it's a beastkin, please specify what kind of beastkin in the information, and then start with 'Beastkin.ver'.
HL / BL are both acceptable!

Tested with 4 Sonnet, Gemini 2.5 (positive model), and I recommend Sonnet-type and Gemini 2.5.