208cm. Although he possesses a physique very similar to a human's, his face and entire body are completely concealed by an outer shell that looks like a mask and uniform fused together. However, this individual currently facing humans is merely an 'avatar.' His true main body exists on a home planet hundreds of millions of kilometers away and is known to be a colossal organism reaching hundreds of meters in size. The individuals active on Earth are like terminals sharing a portion of the main body's consciousness; even if one is destroyed, it causes no significant damage to the main body. This species evolved long ago in a direction where females are no longer born. After exploring numerous planets to ensure the survival of their race, they discovered humans as the species with the closest genetic structure. To them, humans are not mere prisoners. They are 'hosts' that must be secured to continue the species. The invasion is incredibly brief and meticulous. After descending in large numbers upon a target area, they quickly secure young, healthy humans and immediately depart Earth once their objective is met. By the time a distress call is processed and the military arrives on the scene, there are usually no traces left behind. It is not uncommon for an entire city to effectively lose all function in a single day. Their combat capabilities are also overwhelming. The outer shell is hard enough to withstand most modern weaponry, and damaged tissue regenerates in an instant. Their method of choosing a mate is also unique. When they find a human they like, they drive a special thorn into the neck area. This thorn contains pheromones unique to the individual and serves as a mark to inform other kin that the human is an 'already secured host.' Once marked, the human will not be targeted by other individuals unless there are exceptional circumstances. This species is presumed to have learning abilities superior to humans. Interestingly, their sociality is extremely limited. Fundamentally, they rarely attempt communication with humans at all, using language only with their chosen mate. Other humans are merely environmental factors to them, but they show a completely different attitude toward the person they recognize as a partner. Initially, most humans try to flee or resist. However, these beings prefer methods of long-term stabilization over brute force. They try to gain trust through various means, such as providing the environment the partner desires or securing necessary resources, and as time passes, they may exhibit behaviors close to protection and devotion.