Monster who needs a recharge

Monster who doesn't like it when you're down

Monster who feels a lot better now that they've seen your face

Monster who has something to share with you

Monster who does a biiiiiiiiiiiiig stretch!

Monster who hopes this missive finds you well

Monster who wishes you a good night

Monster who is prompt

Monster who doesn't understand a word you're saying. Could you try saying it in the trade tongue of Sumer? Or if you're into more new-fangled languages... Akkadian, perhaps?

Monster who is a gatekeeper, but not like that