[Eleutheria]

Trilead Tetraoxide

I'm reading Volume 7 where this guy shows up in the imperial palace.
1. Never fought anybody before
2. Never left the imperial palace
3. Touched the Infinity and therefore been automatically ported out into the real world
4. Still in the imperial palace

And since you can't get IN the imperial palace without a broken skill like blink, there's only one conclusion. Somehow a member of the imperial family got brain burst installed on him. i.e. prince or crown prince. This is just idle speculation, but I think his identity will never really get explained since it would be really touchy in Japan to include the royal family into your fiction, even a light novel...hence the heavy-handed subtext (but no real explanation)