A term of endearment.
A young lamb, a very young sheep.
Term of endearment.
Any object, typically a blanket, garment or stuffed animal, that is used simply for its comforting characteristics; a security blanket.
A poncho liner.
A fictional character, often morally grey or a villain, subjected to constant stress and angst, so as to create pathos within the narrative and increase the reader/viewer's emotional attachment to them.