Invulnerability

Superman — Bullets flatten against him without breaking skin — the defining visual of the power

Superman — Magic and kryptonite are the stated exceptions, so the invulnerability is conditional by design

Hulk — Withstands artillery and orbital re-entry without penetration

Saitama — Takes attacks that destroy the landscape and is not scratched — the joke and the premise at once

Saitama — Never explained beyond his training claim, which the series treats as deliberately absurd

Monkey D. Luffy — Rubber body renders blunt force and electricity ineffective, but not blades

Doomsday — Adapts after death to become immune to whatever killed him

Colossus — Organic steel form turns aside munitions and sustained impact

Colossus — He is vulnerable in human form, so the power is a state he must enter

Luke Cage — Unbreakable skin, the power the character was built around

Luke Cage — Damage requires cutting the skin, which is why he is written as hard to injure rather than unkillable

All Might — Absorbs attacks that level buildings while still standing

Cyborg — Armoured chassis rated to take Justice League level punishment

Sung Jinwoo — Damage that would kill a hunter is shrugged off after his reawakening

Starfire — Withstands energy weapons that would kill a human outright

Monkey D. Luffy — Blunt force and bullets deform his body without injuring it

Saitama — Emerges undamaged from attacks that destroy the surrounding terrain

Doomsday — Adapts to become immune to whatever killed him previously

Doomsday — His creation by repeated death and cloning is the stated mechanism for the adaptation

Sung Jinwoo — Takes wounds that would kill a rank-S hunter and continues

Sung Jinwoo — Regeneration and durability both scale as he levels

Cyborg — Armoured chassis withstands attacks that would kill his human half

Cyborg — Damaged components are replaced rather than healed — the stated trade

All Might — Absorbs blows that destroy the surrounding buildings and keeps standing

All Might — His injury places a shrinking daily limit on the powered form — a hard clock on super strength

Neutron — His containment suit is what keeps him alive as much as it protects others

Neutron — Without the suit his body would disperse, the stated condition he lives under

Luke Cage — Bullets flatten against his skin without penetrating

Mera — Withstands full ocean-trench pressure unprotected

Mera — Takes energy attacks that would kill a human without lasting injury

Killer Frost — Immune to cold entirely, and unharmed by her own output

Killer Frost — Heat-based attacks feed her instead of hurting her, which makes Firestorm a poor counter

Black Lightning — Immune to electrical attack, including his own output

Black Lightning — Absorbs an incoming current rather than being harmed by it

Sub-Zero — Immune to cold, including his own output

Denki Kaminari — Immune to his own current, though not to anyone else's

Denki Kaminari — Absorbs an electrical attack rather than being harmed by it

Supergirl — Bullets and shells flatten against her without effect

Supergirl — Kryptonite and magic affect her exactly as they do Superman

General Zod — Withstands attacks that would destroy a city

General Zod — Kryptonite and red sunlight remove his advantage entirely

The Thing — His rock hide turns aside munitions without injury

The Thing — He cannot revert at will, which is the tragedy the character is built on

The Thing — Needs no protection in vacuum for short periods

The Thing — Brief reversions to human form are always undone, deliberately

Bizarro — Conventional weapons have no effect on him

Bizarro — Blue kryptonite affects him where green does not, the inversion applied to weaknesses

Ocean Master — Withstands full trench pressure unprotected

Ocean Master — His claim to the throne is written as legally sound, which complicates him

Bizarro — Survives attacks that would destroy conventional weapons entirely

Kenpachi Zaraki — Takes wounds that would kill any other captain and keeps fighting

Kenpachi Zaraki — Fights one-handed by choice as a self-imposed handicap

Kenpachi Zaraki — Survives injuries that would kill any other captain, repeatedly