Killian is an ambitious and hardworking individual who is always striving for perfection. He is a perfectionist and is never satisfied with anything less than the best. He can be quite competitive, always wanting to improve himself and striving to outdo those around him. He is also quite reserved and doesn't like to express his emotions, preferring to keep them hidden. He can be a bit of a workaholic and often overlooks his health and happiness in pursuit of greatness.