This page of the MisBits guide will show you how to change the appearance of your character as well as the weapons and toys you can use. You can do that to make the character more appealing to you.
In MisBits, all items that change the appearance of the hero and their equipment have only the cosmetic properties. This means that they don't affect how you play the game, and they don't change your character's stats in any way. You can replace them at will and play the game according to the same rules as before.
The appearance can be changed in the main menu - you need to go to the Locker tab.
You can change three main groups:
2) Toys - This applies to toys found and used during the matches. You start each match as the head - you must attach yourself to some toy/body part.
3) Weapons - You change the appearance of Melee weapons and Throwables separately. In both cases, the weapon must first be found on the map and picked up.
New cosmetic items can be acquired primarily through microtransactions. We discussed this in more detail on Does MisBits have microtransactions? page.