Created by Tom DeFalco and Ron Frenz in 1987, Leir appears primarily as a supporting character in the Thor comic book series.
His abilities and storylines often involve themes common to mythological adventurers, including heroic quests and battles with other deities or supernatural foes.
Leir, depicted as a deity from the mythical realm of Avalon, inhabits this enchanted domain alongside other Celtic gods.
[1] Recognizing his error, Leir acknowledges a debt to Thor for his assistance against the winged creature and sends a contingent of Celtic gods, including Caber, to aid Asgard.
During this time, Leir seeks to wed the Asgardian goddess Sif, who conditions their union on his participation in rescuing Thor and combating her designated champion.
His journey illustrates the complexities of divine interactions and the enduring quest for honor and alliance among gods across various mythologies in the Marvel Universe.