Vespa appears to be a short human with yellow wasp antennas and yellow wings. She has pastel violet slightly messy hair, with black iris and purple sclera, with a blue bell winter coat.

She is quite arrogant and rude, seeing herself as superior, which causes her to underestimate her enemy's skills. She thinks very highly about herself.

She carries a needle shaped like wasp's abdomen with a large stinger laced with deadly poison. She also carries a honey jar that acts as the poison's antidote.