Mozu is a tall, spear-wielding muscular young man wearing pauldrons that appear to be made of stone. His stone guards were destroyed during his fight with Hyoga.
He has dark dreadlocks that are tied into a low ponytail. He has facial markings of unknown origin that extend from the top of his eyebrows in a curl, to between his eyes, similar to Kirisame's.
Mozu is a cocky and easygoing man who enjoys the company of beautiful women, and strong people. He giddily looks forward to the harem selection every year, hoping for cute girls to appear. He becomes fascinated with Kohaku upon meeting her, due to her combination of strength and beauty, two things he appreciates greatly.
He enjoys this fun to a fault, allowing Kohaku into the harem despite her nearly breaking Minister Ibara's hand. Even in the past, he lamented having to petrify the young escaping Amaryllis, recognizing how beautiful she could potentially be in the future.
Despite all this, he possesses a sharp instinct and cunning, and it is hinted that he knows a lot more than he lets on.
In battle, he lives for the thrill, as seen when he fought against Hyoga who he found to be a worthy adversary. Even after being defeated, he showed himself to be a good sport and even asked his victorious opponent to give him lessons.
Abilities and Skills
Enhanced Physical Prowess: Mozu is a highly competent fighter, serving as one of the two greatest warriors of the Petrification Kingdom.
- Enhanced Strength: He was able to easily throw aside five men (including Oarashi) with his strength alone, and was able to effortlessly overwhelm Kohaku with his skillful spearmanship (Although she was not armed with her typical weapons at the time.) He also defeated Kinro, Magma, and Nikki in one blow each. He and Kirisame are noted to be the strongest warriors of the Kingdom of Petrification. The true depths of his strength are shown when he lasted very long against Hyoga before he was defeated. He could hunt and kill large American Alligators with help from the others.
- Stealth Prowess: Mozu was able to sneak up on Senku and his friends. Even with Ukyo's superlative hearing, he snuck up on them without detection.
Intelligence: Mozu was able to deduce that Kohaku was one of the intruders, although he chose to withhold this information, due to his personal interests.
5 years ago, Mozu and Kirisame were on a boat and found a group of kids including Amaryllis trying to escape the island with their boat. Kirisame petrifies all the kids with her weapon but Mozu tells her to not petrify Amaryllis because of how she can be cute in the next 5 years.
Mozu attends the harem selection and notices Kohaku's strength.
He later finds out Kohaku is an invader and fights her.
Startled to see someone revived from stone, Mozu stops in his tracks to understand the events. Soon he stops Magma from pursuing Ibara, as Hyoga questioned him on his intentions after revealing his views, Mozu tried to sway him into allying with him but subtly thought of betraying him. Ultimately Hyoga declines the offer, before stopping Mozu from killing Senku. The two go onto fight and are equal for some time.  
During the battle, Mozu believes he's gotten the upper-hand and taunts him, though Hyoga dives in the water, something that Mozu realizes. He pursues Hyoga who is seemingly running away, only to learn its a trap. Hyoga modifies Kinro's spear to better fit his Kan Style to fight better. Mozu tried to defend himself from Hyoga's new fighting style but was defeated.
When the island was being engulfed in petrifaction, Mozu remarked on how the fitting it was that his first loss was the last one he had. He and Hyoga promised if they'd ever be freed, they would spar again. He, along with Hyoga and everyone else (but Senku) on the island was petrified by Ibara.
It is revealed Mozu's statue was taken by the Kingdom of Science. When Hyoga agreed to join the Kingdom, he requested Mozu be revived. After being depetrified, Mozu is part of the combat team, sparring with Tsukasa, Matsukaze and Hyoga, excluding Kinro and Ginro who trained elsewhere.
When the Perseus arrives in San Francisco, the warrior team follows the exploration crew. Soon alligators attack, though Mozu and the other warriors defeat them and use the Alligator meat to restock on supplies. 
When Luna arrives, Mozu is in awe at her beauty, while Kirisame berates him for being focused on her looks. While the rest of the crew discuss their suspicion of Luna, a love struck Mozu states she is cute and there is nothing to worry on.
They met during the harem selection. He was impressed by her skill, stating she was strong but declared his status as strongest and engaged her battle nonetheless. Kohaku was in awe at his skill, especially when he easily overwhelmed her and he offered her the chance to be with him if she gave up her friends. However, she refused the offer but the battle never reached an outcome, as Kohaku was petrified.
At first, he was amazed at Hyoga being revived from stone. He wondered if Hyoga was a strong opponent. When Hyoga questioned him on his intentions after revealing his views, Mozu tried to sway him into allying with him but subtly thought of betraying him. After his offer was refused, Mozu wasted no time in engaging Hyoga. In the fight, Mozu noted Hyoga was the first warrior to get him to struggle. After Hyoga won, Mozu gave a sign of acknowledgement for his skill because it was his first battle lost. When the island was being engulfed in petrifaction, Mozu and Hyoga promised if they’d be freed then they would spar again. During Hyoga's revival, he requested that he revive Mozu and they finally got the chance to spar.
- His name Mozu is the Japanese word for Bull-Headed Shrike (Bird that impales prey on thorns)
|Male||Chrome • Ginro • Jasper • Kaseki • Kokuyo • Kinro • Magma • Mantle • Soyuz • Tetsuken • Ibara • Mozu • Oarashi • Matsukaze|
|Female||Garnet • Kohaku • Ruby • Ruri • Sapphire • Suika • Shirogane • Shovel • Turquoise • Amaryllis • Kirisame|
|Male||Taiju Oki • Senku Ishigami • Gen Asagiri • Chrome • Kaseki • Kinro • Ginro • Magma • Kokuyo • Ryusui Nanami • Matsukaze • Tsukasa Shishio • Hyoga • Mozu|
|Female||Yuzuriha Ogawa • Ruri • Kohaku • Suika • Nikki Hanada • Minami Hokutozai • Kirisame • Homura Momiji|