I came up with a theme of sorts for the rabbit version of Joltie, as well as some possible lore for the form. It's a curse that gets placed on him by someone, and he's locked out of his Heart Drive ability, as well as unable to wield his greatsword, due to being weaker while in that form. He comes up with a workaround; channeling his bottled up anger and going into a berserker-like state, increasing his strength via his muscles expanding, as well as causing him to mindlessly pursue whoever is the cause of his anger while in that state. It's kinda funny, actually. He's a berserker, but he's a smol bun. lol