“Great Whirlpool Spider” Squardo is an infamous New World pirate who allied himself with Whitebeard.
He has a bald top, but wavy hair that flows long downwards. In his first appearance, he was seen sticking his tongue out.
He also wears a spider design on his forehead, with a diagonally-placed headband that attaches to it. The spider has a spiral design at its bottom.
Squardo has managed to make himself an infamous reputation in the New World, and has managed to ally himself with Whitebeard.
He appears to be a swordsman, from the sword he wields.

(Source: One Piece Wikia)