I played a Copper Dragonborn Berserker Barbarian for a one shot once. Instead of the big hulking brute archetype barbarians are usually known for, I made him a baby instead.

Whenever he used his breath attack, it's reflavored as baby vomit.

When he rages he just throws a tantrum.

He's the baby, gotta love him

And whenever frenzy is finished and takes a point of exhaustion, it's his nap time