Nanachi is so-called "Hollow"—a survivor of ascension from the sixth layer of the Abyss. Madness and/or death are not uncommon results of such an attempt but, due to certain circumstances, Nanachi was able to keep their personality and mental faculties intact; their body, however, was deformed beyond recognition. Not much is known about Nanachi's past—they were born in the Far North region of Sereni, lost their family and home at a young age and were taken to the Abyss by treachery. Nanachi looks very young, but their vast knowledge of the physics and ecology of the Abyss seems to suggest they've lived there for quite a while. They also appear to be an accomplished healer with significant surgical skills and extensive knowledge of medicinal plants and such. Most of the time Nanachi is cool and reserved, keeping their distance both emotionally and physically. Their ironic attitude often borders on being sarcastic and even cynical; however, behind this mask, Nanachi hides a kind and gentle soul capable of deep compassion and selfless devotion. (Source: Wikipedia, edited)

Draken is one of the main characters from Tokyo Revengers. He is one of Mikey's closest confidants and friends, since he is also Toman's vice-captain. Draken often seems to represent the role of the moral part of the duo, since he appears very conscientious. For example, he later tries to persuade Kazutora to reconcile with Mikey and prevent the war between Valhalla and Toman. Draken has tremendous fighting power and is probably Toman's strongest fighter after Mikey. He loves to work on motorcycles and dreams of running his own motorcycle (repair) store later on. Since Draken doesn't seem to have a family, he lives in Shibuya in a building where women do favors for money. He has a room there and was also more or less raised by the owner, even though this seems quite unusual. He has nothing to do with the business there per se, but simply lives there and also knows all the women who work there personally. (Source: NinskiBobinski)