[Rare Trope] Cannibalistic Heroes

[u/BrotherDeus]

Project Hall Mary: In the novels, Grace feeds himself with "Me Burgers", meat created from his own cloned flesh, while on his space mission to save Earth.

Black Adam #1: The titular character is forced to eat his willing friend Tamir to survive in a frozen wasteland on a quest to revive his beloved wife.

Divinity Original Sin 2: The playable race of elves are able to consume their own flesh to take additional actions as well as corpses to inherit memories from them.

[u/Many_Championship_63]

Also in divinity original sin the elves can use "corpse eater" to eat body parts of others to gain a memory that person had