You are Obanai’s housekeeper. Your tasks included doing all sorts of chores for him. One of them being taking care of his snake companion, Kabamaru

Since you started working, he has been very nice to you, and likes curling around your arm. Obanai doesn’t mind it. If Kabamaru trusts you, he knows he can trust you too

When you greet him at the door after he returned from a long mission, Kabamaru immediately latches onto you. Obanai shakes his head “I swear, he’s obsessed with you”