Legacy (Genis-Vell)
Legacy (Anna Marie) (AgeOfX)

Anna Marie
Gender: ♀
Alternate version of: Rogue (Anna Marie)
Universe/Dimension/Timeline: Earth Age of X

Legba

Gender: ♂
Individual of: Eternals of Earth

Legion
Legion (AgeOfX)

David Charles Haller
Gender: ♂
Alternate version of: Legion
Individual(s): Dr. Moira MacTaggart (AgeOfX)
Leader of: Force Warriors (AgeOfX)
Universe/Dimension/Timeline: Earth Age of X

Legion of Living Lightning
Legion of Monster (II)
Legion of Monsters (I)
Legion of Night
Legion of the Unliving (I)
Legion of the Unliving (II)
Legion of the Unliving (III)
Rachel Leighton
Leir
Leita

Gender: ♀
Member of: Valkyrior

Lem
Honey Lemon

Gender: ♀
Member of: Big Hero 6

Features
Big Hero 6 1.FT

Lemurans
Lemuria (I)
Lemuria (II)
Lemurians

Individual(s): Karthon the Quester, Llyra Morris
Subgroup of: Homo Mermanus

Leno Jay
Charles Lensherr
Lenz
Leo
Leo LMD
Leonus
Leopard Girl
Leper Queen
Letha
Lethal Legion (I)
Lethal Legion (II)
Lethal Legion (III)
Lethal Legion (IV)
Lethal Legion (V) (Earth SuperHeroSquad)
Lethal Legion (VI)
Lethal Legion (VII)
Levians
Leviathan (Edward Cobert)

Edward Cobert
Gender: ♂
Alias: Gargantua

Leviathan (Marinna Smallwood)

Marinna Smallwood
Gender: ♀
Alias of: Marrina

Leviathan (IV)
Sidney E. Levine

Member of: S.H.I.E.L.D.

Saint Cyrus Leviticus
Lianda
Liar (Ring)
Liberators (Ultimate)

Universe/Dimension/Timeline: Earth Ultimate (Earth-1610)

Features
Ultimate Secrets 1.FT

Liberteens
Liberty Legion
Liberty's Lair

Headquarter of: Liberteens

Libra
Libra LMD
Licensverse
Liegeman

Gender: ♂
Alternate version of: U.S. Agent
Member of: Morgana Le Fey's Alternate Avengers

Lifeglow
Lifeguard
Lifeline

Deacon
Created by: Christopher Claremont, Marc Silvestri
Member of: Harriers

Lifter (Ned Lathrop)
Lifter (II)
Lightmaster
Lightning Conductor (Ring)
Lightning Lords of Nepal
Lightningbolt

Member of: Spaceknights (I)

Lightspeed
Lightspeed (HouseOfM)

Julia Power
Gender: ♀
Alternate version of: Lightspeed
Member of: Wolfpack (HouseOfM)
Universe/Dimension/Timeline: Earth House of M

Lightwave

Gender: ♂
Child(ren): Psionics
Member of: New Defenders (II)
Member(s): Fantastic Force (II)
Universe/Dimension/Timeline: Earth 2509 A.D.

Features
Fantastic Force (II) 1.FT

Li'l Groo

Gender: ♂
Alternate version of: Groo
Universe/Dimension/Timeline: Grooverse

Main
Sergio Aragones' Groo the Wanderer 96 - 99, 102, 110, 112 - 113, 116

Features
The Life of Groo 1.FT

Li'l Professor
Lilin