Headcanons
Category: Character Info

Gyomei can hear the tones of a persons soul. This acts much like Sensory Haki from One Piece. By listening to the spirit of a person he can "see" their shape, size, and form. He cannot see cosmetic things about them, like skin color or hair color however. 

His sense of smell is keen as well, not as keen as Tanjiro's but he can use his sense of smell to visualize things as well. Food, water, drinks, flowers, plants. Combined with his hearing Gyomei is able to move around as though he wasn't blind.

Because of these things he is able to sense things about people that aren't visually noticeable or that they might be trying to hide, like agitation, worry, grief, or desire.