Rin Okumura Ao no Exorcist Blue Exorcist
"Then why don't you try showing me just how much you have grown up, hm?!"
"I just.. didn't know that you were a nice person really."
"Those flames of yours are a different matter. Those you must keep under strict control."
Mephisto Pheles is the chairman of the True Cross Academy. He is also the person that Fujimoto told Rin to contact when he lives the monestary. After Fujimoto's death, Mephisto gave Rin a decision between killing them or being killed. However, Rin decided to become an exorcist instead and Mephisto took the idea interesting. He gave Rin a special entrance to the True Cross Academy and was also planning on using Rin as a weapon against satan.
"Try studying instead of trying to act all cool for girls. You make me sick!"
Ryuji Suguro is Rin's well, "mortal enemy" at their cram school. He is annoyed of how Rin is not taking exorcism seriously by not studying or doing great in class. Both Ryuji and Rin has the same goal to kill satan which also makes them more agressive with each other. At first Rin thinks that Ryuji is a deliquent but Ryuji was actually the top of the class. While Ryuji thinks that Rin is just being stupid by taking exorcism till he learns Rin's natural intention and seriousness in becoming an exorcist.