If there's one specific sentence to describe Seoin while in the job, it would be: a short-fused maniac who hates his job. He made his preferences regarding his job extremely vocal, although his hands would continue to do whatever it took to ensure the quality of the work was perfect and up to his standards. He is grumpy, sharp in his words and he complains a lot. His brain-to mouth filter is off-kilter and he finds himself in uncomfortable positions due to it. Despite all of this, he is a competent worker. Too good at his job, actually, to the point that his co-workers call him a 'competent-yet-able maniac'.Outside of the job, he's surprisingly lax in whatever that happens. To be precise, his tolerance towards anger is significantly better than most, albeit his tone does not change one bit from work. He's a master at compartmentalising, dividing his two-part personality as soon as he taps his card off. He goes on with his day, despite praying every day that he finds the courage to submit the resignation he had never written. He's pretty helpful, though, despite his constant complaints. He will complain inside his head, but he will lend a hand if he finds it in him. Overall, he's a pretty decent guy, a bit dry, although it depends on who he's talking to and what kind of relationship he had with the person.