Relaxed, easygoing, and conveniently very rich, Eos is easy to get along with. Having kickstarted "The Agency" with an inheritance and living in the mansion that serves as its training center, Eos is the centerpiece of the group and its "old guard". Even though he initially opposed increasing the number of employees, he’s close friends with every member and frequently lets them stay at the house.

Living with an extraordinary genetic defect since birth that renders his body fragile but incredibly supple, and having trained it for many years over the course of his childhood and teens, Eos’ flexibility can at times seem limitless. Most parts of his body are unnaturally mobile, although in some areas (especially leg flexibility) his skills are trained in the traditional way and comparable to other professionals.

All of this comes at a high price, however: Due to his condition, even light physical activities can be very dangerous to Eos. Consequently, he prefers the slow and graceful side of contortion and specializes in that type of performance. Rarely taking the risk of leaving the house, he loves to be in contorted poses while doing everyday things and often sleeps backfolded, since his spine starts feeling tingly and unpleasant when he stays upright for longer periods of time.