JoseonShiftSwap "Soul Duo": Asriel is a warrior and part of the "summoners of restless ghosts" family, but with the exception of Chara—his childhood friend who was drowned in the lake due to an incident with others. Decades passed as her restless soul lingered over the lake until young Asriel came to the forbidden place. There he saw a little flame at the lake's edge, touched it, and as a result, the soul was absorbed and turned into a stone that split into two parts. That's when Chara and Asriel met for the first time. "A Boss Monster can absorb a soul only if the soul itself doesn't object, and conversely, the restless one won't become part of the monster until it rejects it itself."
JoseonShiftFell "Sealed Demons": Asriel is the son of emperors who formed a marital alliance from Japan (Toriel) and Korea (Asgore), but because of this, the traditions of both sides blended since neither wanted to abandon their priorities. Like his family, Asriel hides his face, and any drawings made by blind artists depicting their features were strictly forbidden, leading to various rumors—from the simplest to the most terrifying. Only family members and the closest associates could legally see their faces. For Asriel, this was Chara—his chief guardian and one of the best samurai warriors, though earlier Chara had been just an ordinary child entertaining young Asriel on the condition of seeing his face. If that child spilled details about the prince's appearance, the punishment would be having their tongue cut out. After the prince reached adulthood, the plan was to kill Chara as someone who had "seen the exalted face" and was no longer needed, which upset both of them. To prove their worth, Chara's only chance was to become the prince's personal guardian—to be one of the very best, as there was no other choice (or rather, only "death"). Thus, Chara became Asriel's servant and the only one who could see his true face. As for Asriel's parents, Chara still had no right to deliberately see their faces, as he meant nothing to them, but due to his proven strength, they left him alone. "One legend claims their faces are so beautiful that their beauty would drive others to take their own lives; another says they carry a curse where even a single glance could make one lose their soul; yet another holds that they are so terrifying that even monsters wouldn't recognize them as kin. Only the chosen ones would say: ..."
