怪裡怪氣 的英文怎麼說?

Son: Mom, we had a new classmate today. He is a bit of a weirdo. He won't talk to anybody and he shows no expressions on his face.
Mom: Son, I am glad you are telling me what's going on in your class. Your new classmate may be shy. You should go talk to him and be nice to him. Maybe he'll warm up to you.
Son: I understand. Thank you, mom.