Tetsu (テツ, Tetsu) is one of Jin's right hand men who work with him and Dai to lead, maintain and protect their group.

Romanji Tetsu
Kanji テツ
Physical Description
Race Robot
Gender Male
Hair color Brown
Eye color Green
Behind the Scenes
Debut By One's Calling
Voiced By: Brett Weaver
Image Gallery

Physical AppearanceEdit

Tetsu appears to be a tall Caucasian male with high brown hair and dimmed green eyes. He is partially rusted on the left side of his face but the rust doesn't seem to be complete as it is not as discolored as normal rust. He is quite muscular for most humanoid robots and wears a short sleeved black shirt with his shoulder knife holder where he stores his combat knife, a black backpack, black fingerless gloves and gray pants that tuck into his black boots.


Tetsu is a brave, loyal, optimistic and comedic robot who is always seen standing by Jin's side. Tetsu has been shown to be quite calm while maintaining a lighthearted and upbeat attitude most of the time, he has also displayed both caring and boldness through his efforts to protect both Humans and Robots alongside Jin. He has a firm belief in Jin's abilities and leadership, showing their extreme loyalty, they also believe that because of conviction, the Ruin on someone's body could be stopped (though this may have just been a joke).[1]

Casshern SinsEdit

Dai and Tetsu

Partnership and loyalty can be a worthy aspect of surviving the end of the world

Tetsu's life before the Ruin are completely unknown, sometime possibly before or after the Ruin he met Jin and Tetsu where they became very close in partnership. They created a group of both humans and robots including Gido and Toro in search of finding Luna in order to heal the effects of the Ruin.During their journey, they found a mechanical canine who like Jin, was not rusted by the effects of the Ruin. [1]

While greeting this newcomer into their group they are discovered by marauding Bandits. Dai and Tetsu quickly stepped up alongside Jin to battle these Robots until they realized Jin's reputation and moved along instead of fighting. Their next task was to follow the mechanical dog into finding its owner who was trapped under a giant prism. Jin commanded Dai and Tetsu to use their unique equipment to detonate the prison and free the master who turned out to be non other then Casshern.[1]

A man who had been missing from the group named Gido returned with the group of bandits who had passed by as soon as Casshern was freed. Tetsu questioned if he had betrayed them but Gido assured them that he was trying to save the group by devouring Casshern. The bandits failed to do so and intern, the group pressured Jin to try and devour Casshern in order to save their lives, Dai and Tetsu took no part in this. After Jin calmed the group down by explaining his firm belief in justice and equality, they decided to leave Casshern and the mechanical dog named Friender alone. Dai and Tetsu took note to both Jin and Friender's firm convictions, and even believed that in fact may be the reason they don't decay from the Ruin.[1]

Skills and AbilitiesEdit

Tetsu's Knife

One must always be ready to protect themselves in a world of danger and death

Expert Combatant: Though not shown directly in battle, both Tetsu and Dai have stated that they have fought before but numbers can be a problem for them.[1] Even so they were not afraid to face a large number of Bandits with only three men including themselves and Jin, boasting their expertise in battle.[1]

Expert Strategist: Tetsu was able to devise and preform a strategic plan successfully shown when they were able to skillfully free Casshern without injuring anyone in the group, including themselves.[1]


Combat Knife: Tetsu carries a sharpened Combat Knife that he uses in battle. He carries it on his combat vest in his shoulder carrier.[1]


Casshern Sins Edit

11. By One's Calling


  • Tetsu and Dai's aspect of morality "Partnership".


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 By One's Calling