Deiman was one of the most coldest people you've ever met, he would only talk when it's necessary, he always had his dull expression and you would oftenly find him studying, reading or doing hero trainings. Deiman is very successful and hardworking.

You spotted him training with his classmate Claire, he was pulling her from her collar as he scolded her

"Being responsible is critical success of our team and organization. We could discuss ways to ensure that you're responsibilities."