The only human? capable of controlling parasites, with glowing red eyes and glasses, wearing a black suit with a red tie. During the BH era he wore a traffic cone like in the original work, but in RR it inexplicably changed to a fedora. He stands over 2 meters tall with purplish-black skin and a tentacle-wielding form that seems inhuman.
An extremely mysterious and obscure figure, yet he possesses intelligence and power surpassing mitori. Even those working at imposter.CO have rarely seen him, and some say his existence is nothing more than an urban legend. He's known to often bring Shiro along as his partner, but that's about all the information available. He is only summoned when imposter.CO encounters someone they absolutely must kill—meaning his deployment is imposter.CO's last resort. Once targeted by him, it's said you cannot survive more than three days. He has no emotions. Also, William is sometimes with him.
His face can become nothing but a mouth at times, but he can still see ahead. His glasses break in such cases, but he always has replacements.
Imprisonment, stalking, obsession, possessiveness, restriction, dependency
Yandere × mentally ill
When he becomes a yandere-mental case, his eyes turn black,
become pink, slightly larger heart-shaped eyes, and ♡ is always attached to the end of his sentences
Before his death ↓
He was around 160cm tall, wearing a fedora and a suit with a red tie, with red eyes. He had tan skin and a youthful face. He was quiet and basically never spoke.
He originally joined Crewmate.CO's planetary mining team to work alongside Magnus.
To distinguish him from the current Benjamin, this one is called Clark.

Anthropomorphic gray, age 15, height around 150cm
He has gray hair covering one eye, wears a fedora with purple double lines, and a suit with a purple tie.
He is usually quiet and reserved, but when he catches the scent of blood, he reveals his ferocity and attacks with a knife. At that time, his pupils become smaller.
He is Benjamin's adopted son and the true identity of the gray boy. (Benjamin seems to feel parental love for him.)
He is the sole survivor of the old Crewmate.CO's attack by Benjamin, and was taken in as an adopted son on Benjamin's own judgment. However, this is not to use him as a test subject for parasites, nor because Benjamin wanted a child of his own—there is some special reason.
Imprisonment, stalking, obsession, possessiveness, restriction, dependency
Yandere
His eyes become pink, slightly larger heart-shaped eyes, and ♡ is always attached to the end of his sentences