Captain Komamura appears to look like some sort of wolf type man as he has canine features. He has light-brown fur, and bright yellow eyes, and wears standard Shinigami's robes along with a Captains jacket. He also wears large iron boots rather than sandals, and occasionally wears armour or protectors on certain parts of his body. Before Aizen, Gin and Kaname betrayed the Soul Society, Komamura wore a helmet over his head to hide his appearance, however now he has enough confidence to go about not wearing it.
Despite his intimidating appearance, Komamura is a gentle Shinigami who raises his Squad fairly and appropriately unlike a select few of the other captains. He is also eternally grateful to Captain Commander Yamamoto for accepting him, and as a result he would gladly do anything to protect him, even if it means putting his life at risk.
Being a Captain, Komamura has immense Spiritual Pressure, and is an expert in fighting with his Zanpakutō, as he has an insanely strong Bankai, and his Shikai is also very powerful. Being a large beast-type of Shinigami, he also has amazing strength, and could easily fight on par with a strong opponent even if he is unarmed.
Not much is known about Captain Komamura's past, except that he was friends with Kaname Tousen since joining the Soul Reaper Academy, and that Captain Yamamoto encouraged him to become a Shinigami despite his looks and the way he was treated for it.