1) Absentminded one 2) Abstracted person 3) College prankster 4) Dog that barks at Luna 5) Infatuated daydreamer 6) One offering his seat 7) One who scrapes hides 8) Sentimental sort 
• (n.) One who abstractedly wanders or gazes about, as if moonstruck.
Moon'er noun One who abstractedly wanders or gazes about, as if moonstruck. [ R.] Dickens. 
Mooner is British slang for a mad person.