No. 4  
Muffin, formerly known as ‘Derpy Hooves’, was a resident mailspony of Ponyville. She was sentenced to death by the Equestrian religious court due to an unknown reason. However, the execution did not kill her - she was still living and breathing, but the mare known as ‘Derpy Hooves’ was dead. Devoid of meaning of life, she was believed to be associated with several recent murder cases in Ponyville.  
In game, she is a mage who can consistently deal true damage and wear down enemies extremely quickly. However, she lacks defensive tools, and is prone to enemy concentrated fire.