Within Arms is an incredibly diverse and powerful roster of combatants, each of which are vying at the shot of becoming the greatest Arms Fighter of all-time. There are 12 Characters in total - 11 of which are playable in every single gaming mode - and each fighter comes with their own special set of Abilities and preferred usage of Arms. Of the these select few, ten of them are regular fighters while two of them are the Bosses of the game. The characters found in Arms include: Spring Man, Ribbon Girl, Ninjara, Master Mummy, Mechanica, Min Min, Kid Cobra, Helix, Byte & Barq, Twintelle, Boss Max Brass, and Boss Hedlok.