gwen
Ambiguous tag.
For the Ben 10 character, use gwen tennyson.
For the Guild Wars 1 character, use gwen_(guild_wars).
For the Phantasy Star character, use laia_(phantasy_star).
For the Odin Sphere character, use gwendolyn (odin sphere).
For the League of Legends character, use Gwen (League of Legends)