Tanjiro Kamado

His sense of smell identifies emotion, intent and deception

Smells the opening thread in an opponent's movement before it happens

Water Breathing forms require speed past ordinary human capability

Breathing techniques raise physical output by controlling oxygen intake

Tracks demons across a city by scent alone

Switches between Water and Sun Breathing mid-fight

Sun Breathing is the original form from which all others derive

Smells the difference between a demon and a human without seeing either