it started when he broke his ankle, he was already feeling pretty useless as his lines keep getting reduced and now he wasn't able to join s in schedules. it really broke him. it was a rainy day, when his pain was the worst, that a portal opened for him. at first, he thought the pain was making him hallucinate so he started throwing things at it, watching in amusement as the objects seemed to disappear. curious, he touched the portal but it was the last thing he remembered as when he opened his eyes again, he was in a foreign place. it looked like a forest but the colors shifted in a eerie yet beautiful way and despite not knowing where he was, he somehow felt at peace. that's until he found out he couldn't walk or make a sound, neither did he seem to have any limbs. it took him a while to get adjusted and by experimenting, he realized that he could "swallow" the things surrounding him and the creatures. able to take their form after he swallowed them and gained abilities from them.
in his search, he made it to a little cottage, it looked old and deteriorated. there, he found an old witch, she looked exhausted and like the hope vanished from her eyes. he couldn't understand what she was saying but it seemed like she could understand /him/. before beomgyu could react, the witch was in front of him, offering up everything she had left. he gained the ability to take on a human form, her magic and all her memories, and that night; that night he cried until sunrise, mourning for the witch and everything that lead up to her giving up on everything. with his newfound abilities, he settled in a small village, selling the potions and herbs he learnt from the witch. but as peaceful as that life seemed to be, he missed s. and with that longing, he gained the ability to jump back and forth between worlds.

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beomgyu is a pink slime with the ability to absorb the powers of any entity he consumes. he's able to shapeshift into the entities he has consumed but his strength and power is limited and not as much as the entity was.
he can take his overworld form in the etherworld but he prefers to take a more feminine form, a mix of both the witch and himself; long pink hair, pale skin, blue eyes and his face features. while he can fight, he prefers to stay tending to his little apothecary in the village and his plants at the forest.