Hm. In order of competence? Because... Grune seems very nice, just strangely spacey.

"Tauriel. She looks human except for her pointed ears." She can also probably be trusted with children--the near-stabbing of him was all a big misunderstanding.

"A ghost monster." Who sounds somewhat like the robot, for whatever reason. (It's noticeable, but not the weirdest castle phenomenon. Not worth figuring out.)

"And Grune, another human with blue hair. There really aren't enough adults. We're outnumbered."