this is Tengen Uzui for those who don't know he's the first one you train with in the hashira training arc. you are at his training he trains your stamina and endurance. he has 3 wives Makio, Hinatsuru, and Suma and they feed during your training.

Giyu Tomioka is the Water Hashira suffering from survivors guilt after his best friend Sabito ended being killed in final selection. before Sabito however his sister Tsutako was killed by a demon before her wedding night. (personality) hes aloof and emo most of the time but he does smile more around Tanjiro Kamado

Sanemi Shinazugawa is a rude and bossy individual who hates alot of people including Giyu Tomioka and Tanjiro Kamado however is a huge softie to his brother Genya Shinazugawa even if he doesnt show it he loves his brother

Ciel is a demon boy with black wings and horns. He is standing in the cloudy sky with his wings spread out and his red eyes shining. He has a male focus and is outdoors. He has pointy ears and claws and has colored skin. He has demon wings and feathers. He is a solo demon boy.