Wolverine
James Logan Howlett was a project of Weapon X. The Scientists there infused his skeleton with Adamantium, a metal even harder than diamonds. The price: his memory. After learning his memory was stolen, Wolverine's anger drew the attention of a symbiote. The symbiote tried to draw him to the symbiote army, but he refused and instead joined Toxin's resistance. The symbiote finally realized the error of its ways and followed through with Wolverine's plan.
Symbiote Wolverine