This is another one of the class A elders. Rio is the class A observer, he along with Evelin teach Emilia and the rest of her (future) team.

Here's the character description for Rio

ROLE: Class A elder, helps train Milliana  and Emilia

PERSONALITY: Doesn’t like to lose, hot headed, protective (though he often gets blinded by his ego and acts the exact opposite), cocky, funny/sarcastic

Some background information would include:

- Rio has a bad track record at the school because he killed 5 students during a test.... yet he wasn't fired (the reason behind that will be explained later)

- Rio is one of the most trusted of the elders, as he never fails the tasks he is given by the headmaster.