MK-99

Biography
MK is a battle droid cobbled together from old droid parts that were scavenged from a Mandalorian Camp on the Dxun Moon, as well as parts Borbo had scavenged from the Revanite camp. His first act was to murder his creator and join with Wrath, a Mandalorian who his logic circuits recognized as an ally.
 * A Mandalorian War Droid


 * A old protocol droid
 * Bits of an HK series Assassin Droid

PERSONALITY
MK-99 suffers from a multiple personality disorder.
 * His main personality is much like HK-47 from KOTOR.  An assassin droid that, while loyal to his master, has little patience for "meatbags" in general and gladly takes any opportunity to express that displeasure physically or verbally.
 * His protocol droid personally is similar to C-3P0 including his incapability of inflicting harm upon another sentient being.

Story Notes

 * MK's programming is a mixed up mess on the level of "Johnny 5" from Short Circuit.  It is amazing that he's functioning, and quite possible that he could become an independant droid at any given time.