Ein is a secret character in DOA3.
First complete story mode with all characters. Then get a high score as Hayate in either Time Attack or Survival, and enter name as EIN. This unlocks Ein and the Random Select icons on the character select screen.
Ein is a character with strong ranged tools and arguably some of the best whiff-punishment in the game with


and



, both if which are very fast and cause high damage.
He has fairly limited options when fighting up close, meaning he should try to avoid letting characters who excel at fighting at point-blank range get in his face.
His


is a very fast launching move that can be used to catch opponents trying to attack from disadvantage.
Should he catch a backturned opponent with his


, an oversight with the game's hurtboxes will usually let him hit them with a



if done immediately afterwards.