SCP #zero zero three one five-Y:
Human Name (called by researchers): Yuri
SCP Name: "Ghoul"
Type: Euclid-Keter
Abilities: Growing extra wing-like limbs from his body.
Extra: He craves flesh of humans.

SCP #zero one two two eight-Y:
Human Name: Yugo
SCP Name: ??
Type: Safe, maybe Euclid?
Abilities: It is unknown, other than he can hear voices and is very paranoid.
Extra: No one knows what he can do, so he's also cooped up in his "room".

SCP #zero zero four zero one-Y:
Human Name: Yuya
SCP Name: ?? (Sometimes referred to as odd eyes)
Type: Euclid
Abilities: It's unknown what he can do.
Extra: He spends most of his time with the Euclid "Astra".

SCP #zero zero five two five-Y:
Human Name: Yuto
SCP Name: The Phantom
Type: Euclid
Abilities: Phasing into shadows, remaining unheard and unseen,
Extra: He normally uses his ability to listen into the conversations the scientists have.

I may add black wispy blotches to Yuto's face, but yeah.
(nUMBERS :<)