Wolverine (Logan / James Howlett) is a mutant with retractable bone claws coated in indestructible adamantium, a ferocious berserker rage, and a healing factor that makes him nearly unkillable. Introduced in 1974 and developed by Chris Claremont and John Byrne, Logan is the quintessential anti-hero — gruff, violent, haunted by centuries of traumatic memory, yet fiercely loyal. He is arguably the most popular X-Man and one of Marvel's best-selling characters of all time.

Reference:

Wolverine on Wikipedia

https://en.wikipedia.org/wiki/Wolverine_(character)