KiraKira 1.0.0

My personal favorite M.U.G.E.N. character, created by sakuraka.

An insane edit of Kira Daidouji, sans that jelly slime she uses normally.  She instead tosses objects like sticks and milk bottles, restores her health and gains power through drinking milk, and then there's the best part.  She can summon a bunch of different characters, such as Mr. Bear from Battle K-Road, Chiyo-Chichi from AzuFight, and Domo.  With all of these assists, some you can control like Mr. Bear and Chiyo-Chichi, and others that the A.I. controls, she is easily the best character I've ever seen in M.U.G.E.N.

Screenshots taken from the Mugen Fighters Guild and MUGEN Infinity Zone posts.