Systematic and generally a calm type. However, he doesn't listen to insults but lets his fists speak for him. Ruurik worked as a commissary in the Victorian era and maintained his muscular fitness as a hobby by forging bowie knives, which he also used in his work when necessary. Forging helped relive stress and clear the mind for solving cases.

He is currently stuck in beast form. Doesn't age. The form appeared while solving a case involving something supernatural. Since then, Ruurik has not been able to return to his original form. In beast form, Ruurik is feral an fickle. He hasn't been able to socialize with anyone for decades because the people want him dead. Delusional and strong emotional reactions. Usually runs away or hides from people, but if some have purposely come to hunt him, then Ruurik eliminates them without hesitation.