cupid
Cupid is the Roman god of erotic love and beauty. He is armed with a bow and arrows, and may be trying to instigate some chemistry between two people. In modern culture a cupid is depicted as a winged infant.
On Danbooru this is left as a general tag due to the generic depiction of a cupid. So this is not to be confused with a cherub, a winged infant that is typically unarmed (a misconception, but maintained for the purpose of tagging).