45 is Minato's favorite guest haha... Nobody else gets along with their Persona as well as she does and Minato's all "!!!!! somebody gets it" and she hangs out with him in the Velvet Room without making him go outside and she never gives him a headache. She asks questions without being frustrated with his way of responding, and she listens to him instead of pushing and getting mad... all great things. This whole Attendant situation is pretty frustrating for him because in his opinion, 45 and Souji do a much better job at relating to people and he just wants to be out there stabbing things, but this is how it is. He can only help people if they go to him first since he can't really leave the Velvet Room long on his own volition, so he appreciates the fact the 45 is out there proactively guiding people, sort of. Lots of people don't like or trust the Attendants in general and Minato doesn't help anything, so he's glad 45 is there treating him the same as always.