Originally Tetsuya's pet dog Lucky, its data was used to revive it as Friender after it was killed. In order to support Casshern, he can transform into a jet, submarine, tank, or a motorcycle, and is even able to breathe flames. Friender is a brave robotic dog capable of standing up to the Andro Army alone. 

__In Casshern Sins:__
A robot dog who stayed with a robot community that peacefully accepted the idea of death, Friender himself does not display any signs of deterioration. After Casshern destroys the entire community after going berserk, he cautiously follows him, eventually trusting him. He primarily intervenes to stop Casshern whenever he goes berserk.    ~!Near the end of the anime, only he stayed alive, playing with Ringo. !~ 

The brilliant Dr. Azuma created many robots to aid humankind. However, during a thunderstorm his lab was struck by lightning, corrupting the programming of one of his robots, BK-1, who renames himself Braiking Boss and declares that instead of serving mankind, mankind will now serve him! He brings other robots together into an overwhelming army bent on enslaving the human race. 
Tetsuya, Dr. Azuma's son, asks his father to turn him into an indestructible android so that he will have the power to destroy the threat his father inadvertently created. Shortly thereafter, Braiking Boss captures Dr. Azuma and his wife, Tetsuya, now renamed Casshern, sets out to turn the tide of the war and rescue his parents, with the help of his girlfriend, Luna, and robot dog, Friender.

[Wiki (jp)](https://ja.wikipedia.org/wiki/加藤昭二)

In the distant future, where cyborgs and humans struggle to survive after the war which destroyed the world, a being in white suit awakens. His name is Casshern and he remembers nothing of his own past. 
In barren and dark dystopian world, where every being alive seems to hate his existence and the evil from his past wants him dead, Casshern, haunted by the flashes of his past memories has to survive and figure out who or what exactly he is and how he got to where he is now. But he does not know that he might not like the horrible truth of the past, hidden deep inside his mind... 
Created as an intended reboot of Casshern franchise.

[Twitter](https://twitter.com/ECervantesC)

A Mexican voice actor.

The excessive adventure begins when a mysterious flying life-form, UBO came to "Tatsunoko Anime World Island" where all the Tatsunoko animation characters live. TV special animation program featuring all-star Tatsunoko characters. 
 
(Source: Official Website)

A manga remake of the 70s Tatsunoko Sci-fi Anime "Casshern".