User blog:AYET/AY's conundrum

The below riddles could be referring to a person, a specific DF ability, a name of a DF or a place, anything that may be related to One Piece canon. Can you solve the riddles?

1) He has trouble keeping it to himself, despite claiming to have a tight lip. (Who is he?)

2) His presence will lighted up your day. (Who is he?)

3) I have something in common with canines and felines but I ain't no quadruped. (Who am I?)

4) I'm telling you "he" just love candies! (Who is "he"?)