Mokiefer is a mercenary who befriends Kiefer, becoming something of a sidekick for him. She is very much a parallel to Kiefer, wearing similar armor, colors and weapons as well as having an AI.

Unknown to Kiefer, Mokiefer shares a history with him, and after so long has found him again. From all the information she could find on Kiefer, she decided to dress up similarly to him, causing some people to think Kiefer is causing chaotic acts when really it is Mokiefer. The name as well is taken from Kiefer, due to her apparent fascination with Kiefer.

She often can be impulsive, sarcastic and at times care-free, relying on Josh during fights and infiltrations.  She tries to hide any negative cues from Kiefer upon running into him, playing a happy and friendly person while she continues her plans.

She is a highly skilled assassin, who rivals Kiefer's own talents, the two almost being mistaken for each other due to similarities.