I have the perfect solution for my trio situation that I have been trying for! Certainly, you all remember my proposed trio, which you have all pointed out is not very common place.

Well, I have decided to make a pair of teams, both from the Department of Mary Sues, who team up on a particularly stressful mission. What I have in mind is The Siren, a South Park badfic I have claimed some time ago. It has literally fifty original characters, at least three of whom are Mary Sues and the rest of whom are Bits. Here is a link to the story.
https://www.fanfiction.net/s/7398957/1/The_Siren

The two teams will consist of-
1. Ellis and Wells
2. Bessie and Butler

During the mission into The Siren, Agent Butler will begin to show excessive homicidal tendencies that do not discriminate between Mary Sues, Bits and Out of Character Canon Characters. Because of this, he will be taken down and taken to FicPsych, and Bessie will, at least temporarily, join a trio with Ellis and Wells.

Here is the profile for Agent Butler.

Agent Butler
Known Aliases: Subject 11479

Species: Human

Age: Uncertain

Appearance:
- Eye color: Innocent blue
- Hair: Black and slicked back with a Handlebar mustache
- Height: Described as towering

Personality: The Butler is obsessed with cleanliness and manners. He will berate people for not wiping their feet on the door mate or having poor table manners, or anything of the sort. He pays very close attention to detail, and for this reason, does all the cleaning in the RC himself, an activity which he frequently can be found doing. He holds punctuality in very high regard and insists that the daily routines of him and his partner be kept up, unless there is some factors making it impossible to do so. He loves fine foods, especially Italian, and he dresses in fine clothes, listens to Baroque and Classical Era music, and enjoys classical literature.

However, underneath these traits, he is a very disturbed person. He thrives on murder, and takes pride and joy in keeping his friends and his foes alike guessing about everything regarding him. That is why he never talked with anyone about his past and why he eliminated anything and everything about him in the PPC database before trying to murdering his partner. That being said, he prefers not to put his trust in others very often.

While he goes about his "dirty jobs" in the field, he indulges in some eccentric urges that are mostly unique to each fandom, such as hording Chocolate Frog Cards from Harry Potter, or collecting Morgul blades from the Lord of the Rings. He has an odd habit of frightening his targets so that they either run away, giving him the pleasure of a good hunt, or turn and fight, to give him the satisfaction of defeating yet another target. That being said, he is a particularly sadistic agent. Whenever he hunts a target, he favors a Glock 18 handgun and a Freedom Fighter Combat Knife. Before killing his targets, he always gives an insincere "sorry".

As he is hunting or fighting a target, he becomes more focused and, in his eyes, the world slows down. He experiences a rush of adrenaline that can help him achieve feats of amazing physical conditioning. Anything that gets in the way of him and his target as he is in this state tends to be the object of his quick and intense wrath before he immediately resumes his hunt or fight. Also, while in this state of mind, he has a bestial tolerance to pain, shrugging off what would normally slow down other life forms.

After a kill, he tends to remove the organs and intestines from his victim with surgical precision, and places them in plastic bags, clearly labeled to distinguish which organ is which. He keeps the organs and intestines as trophies in individually marked porcelain jars, a practice which his partner, Bessie, shared for a time.

Aside from all these personality traits, he is a man of his word and greatly dislikes those who are not. He seems reluctant to kill children, but will indiscriminately if he feels that it should be done. He has an odd habit of forming attachments with his most persistent foes, such as Agent Spencer Ellis or Melvin Moore. However, he dislikes Mary Sues on account of their more often than not poor manners and self centered personalities.

Abilities: He is a very observant individual who pays close attention to detail and who can correctly guess what his opponent or target are about to do based on what little he knows about them. He has a surprisingly detailed knowledge of the anatomy of many different life forms from many different fandoms, and knows how to use nearly any environment to his advantage and use any weapon he can get his hands on. He is a deadly and accurate shot with a fire arm or other ranged weapons, and he is a force to be reckoned with in hand to hand combat. He also knows how to operate PPC Technology, even what he is technically not allowed access to on a regular basis. He has sufficient knowledge of the methods of FicPsych to deceive anyone but the professional doctors into thinking he is cured.

Background: Very little is known about Butler's past. And now that he has, for as of yet unknown reasons, destroyed any evidence of his past, even his name has been lost. However, it can be assumed that he was adopted by a negligent mother and experienced some childhood trauma, possibly involving surgery of some kind. It is also probable that he was ignored or disliked by his peers early on in life. Upon joining the PPC, he was given a position in the Department of Mary Sues, until he somehow snapped, deleted all his personnel files, and began plans to murder his partner.

When said plans failed, he was taken to FicPsych, where he was evaluated with an unidentified form of psychosis.

Please note that this is not a Permission Request. I just want your opinions and suggestions.