WARNING: This page may contain spoilers or solutions to puzzles. Read further at your own risk!
In Version 6, it is shown that after the Oni kills, the victim also becomes an Oni (鬼 Oni?, lit. "Demon") themselves. The new "Character Onis" will turn against Hiroshi and chase him. These transformed Onis also seem to be able to transform back into the original character.
The movement and speed of the Transformed Onis are identical to the original Oni. All three can even appear as random chases just like the original. Towards the end of Version 6, this makes five different enemies that begin to appear at random. Note that if one Oni chase is activated, only scripted events can add another Oni.
Transformed OnisModifierJMU Ao Oni
If you input Hiroshi's name as "JMU" in the name entry screen, Jon will be in the kitchen resting in the sofa. If you make the Oni chase Hiroshi to the kitchen and cease chasing, going back to the kitchen will make him turn into the JMU Ao Oni (jmu青鬼 jmu Ao Oni?, lit. "JMU Blue Demon")
Mika OniAs Hiroshi is about to enter the basement, he hears Mika's screams from the kid's bedroom. As Hiroshi enters the room Mika was in, he sees the Oni supposedly eating her. Later on, Hiroshi will encounter Mika in the basement for a few seconds. She then morphs into Mika Oni (美香鬼 Mika Oni?, lit. "Mika Demon") and chases Hiroshi around.
Takeshi OniAfter Takeshi hangs himself in the annex, he will later appear as Takeshi Oni (たけし鬼 Takeshi Oni?, lit. "Takeshi Demon"). The Takeshi Oni also appeared in the South Park Mode.
Takuro OniAfter Takuro was apparently caught by the Oni, he will later reappear and ask to join Hiroshi. Just before Hiroshi places the final blue piece into the frame which unlocks the exit door, Takuro turns into Takuro Oni (卓郎鬼 Takurō Oni?, lit. "Takuro Demon") and pursues him.