Mack
About: 12-year-old non-identical twin boys whose parents died of old age. (Mack is Sam‘s twin.) Sam’s real name was hard to remember, so it was changed.
Background (with Mint & Sam):
Mint, Mack, and Sam are a trio of orphans who became a “mini family” after a zombie-monster apocalypse began. They live in a secret cave behind their old orphanage.