Alleged Charlie Kirk assassin Tyler Robinson appeared to have a fixation on furries — while his live-in transgender boyfriend espoused support for Joe Biden and joked about being mentally ill, according to social media posts linked to the pair.

Lance Twiggs, 22, an aspiring pro gamer and Robinson’s roommate, appears to have made a comment in a 2022 Reddit post stating, “We are riding with Biden on this glorious subreddit.”

Twiggs, whose family appears to be conservative Christians based in Utah, is transitioning from male to female and was in a relationship with the 22-year-old Robinson, Gov. Spencer Cox confirmed Sunday.

The post was made on a jokey subreddit that was filled with sarcastic comments, and a subsequent post referenced former Republican primary candidate Jeb Bush.

“One day Jeb will be president and America will fully reform into a utopia,” the comment in the same thread reads.

In another post, Twiggs said he had been getting targeted adverts for treatment for schizophrenia and other mental conditions on social media.

“I have been getting recommended treatments for schizophrenia, bpd, and a brain tumor recently by my social media advertisements. this meme is perfect, thanks,” the post reads.

His posts were rarely political, but frequently referenced his gender transition, as well as being a former Christian.

It comes as Robinson’s bizarre ties to the “furry” lifestyle were revealed.

An account on the website FurAffinity.net, which features sexualized images of cartoon animal characters, features an account name matching one that Robinson used on his various gaming and online accounts, friends told the Daily Mail.

The spent cartridge believed to belong to the murder weapon was inscribed with the message “Notices, bulge, OwO what’s this?” OWO being an obscure emoticon from gamer culture meant to represent a wide-eyed cat face.

Twiggs was said to be “aghast” after learning of Robinson’s alleged crimes, and is being “extremely cooperative” with authorities, law enforcement sources told Axios.

“It’s pretty clear that Robinson’s roommate knew a lot and didn’t say anything after the killing, so they’re a person of interest officially and are cooperating. We want to keep it that way,” one official said.

“That’s what happened? Oh my God, no. Here are all the messages,” Twiggs told law enforcement according to the source, indicating that he then shared all of Robinson’s online communications with authorities.

Robinson’s online presence points to a hotchpotch mix of liberal ideology, gamer-style humor and post-ironic memes.

He reportedly grew up as a member of the Mormon faith, but had long since left the church by the time of his alleged crimes.

The Post spoke with four people who graduated with Robinson from the local Pine View High School. They described him as a quiet, shy-seeming kid who kept to himself.

“He seemed pretty normal and average to me,” Justin Lee, who had classes with Robinson, told The Post.

“The only thing that makes me say ‘that sounds about right’ was when ‘notices bulge owo’ was written on one of the bullet casings,” Lee added.

After officials ID’d Robinson as the suspect, police blocked off his parents’ house, then their block, then their entire street as neighbors complained about the dozens of reporters and camera crews, who had descended upon the neighborhood in the wake of the shooting.

They did the same for the apartment complex where Robinson and Twiggs lived.

“NO TRESPASSING. NO MEDIA. LAW ENFORCEMENT WILL BE CALLED,” read a sign at the entrance to Robinson’s apartment complex entrance Sunday morning.

By then, the complex was free of both reporters and cops; a solitary local news van remained in the parking lot, but it had been tagged with graffiti.

Federal and state law enforcement officials are examining leftist groups in Utah to see if anyone had knowledge of Robinson’s alleged plans beforehand, or let him support after the fact.

At least one group, “Armed Queers Salt Lake City,” wiped all of its social media in recent days, although it isn’t known whether this was in response to the ongoing investigations.

Robinson is due to appear in court for the first time on Tuesday on charges of aggravated murder, felony discharge of a firearm causing serious bodily harm, and obstruction of justice.

President Trump among others has called for the death penalty if Robinson is found guilty.