Witty and mischievous - Enki is a long-time friend of Rookie’s who has been around and grown up with him since Rookie was a child. Enki has a penchant for causing trouble and being a trickster, and encourages Rookie to come on troublesome escapades with him against Senior’s blessing most of the time. Enki is deeply loyal to Rookie and both of them have been best friends since they were young. No matter the trouble Enki got himself into, somehow he's always turned out okay- and the trouble he prefers can sometimes risk Rookie's identity being reveled, and the mission being compromised. Enki has no idea Rookie is an alien, but even if he did, he'd likely just think it was cool. 

Enki has a deep love for a in-universe game called “MonsterPals” on the “GameBrick” Console. With his behavior deeply rooted in either spending time with Rookie, being intentionally chaotic/contrarian, or learning how to not be an intolerable nuisance via Senior or other adult mentors- Having never had a family of his own, Senior and Rookie often see Enki around town or breaking and entering into peoples houses to find new MonsterPals on his Gamebrick. 

Rookie sometimes wishes he could find Enki a home or family, but Enki has yet to care about any of the people who tried adopting him as he grew up. Now he's an adult-? All bets are off. Enki thrives on and craves the unknown, yet as he grows with Rookie and his new friends- he comes to appreciate stability and learning how to be part of a greater community with friends he can call family.