Scylence

Scylence is a true behemoth, even amongst kaiju. He has been defeated, destroyed and rebuilt so many times by his creators, The Syndicate of The Black Flame, that no one is really sure what he is anymore. His flesh is made of biomechanical fibres that he can manipulate like tendrils if they become severed and protect his organs and endoskeleton. The white plates of armor that cover his body were once organic but now are a bastardised hybrid of bone, various plasticised metals and other inorganic materials. The glossy black parts of him are a new addition, made of a practically indestructible laminate polymer. His tail is tipped with a blade that he uses as a sword, it's diamond edged surface can slice through all known kaiju hide. The technological augmentations inside him have given him various abilities like a laser-focused beam that he emits from his mouth and enhanced strength and durability. All these features were made possible by Scylence's immortality and regenerative capabilities. No matter how many times the guardian kaiju destroy his body, a piece of him always survives, allowing The Syndicate to retreive and rebuild better than before.
All the modifications have had a complicated effect on the kaiju's mind, however and when it's power level reaches new heights, usually while fighting the guardians, it breaks free of it's controllers influence and rampages unstoppably. The second mouth on it's chest can consume energy from opponents and when it rampages, can absorb a massive amount of energy and release it in a vast energy cannon that causes devastation on a cataclysmic scale. While in combat, the guardians are often disturbed by the cybernetic monstrosity, as the body they fight and the soul beneath seem almost like two different entities...

Powers:
Ultra strength
Hyper durability
Immortality
Regenerative properties
Laser emitters
Cataclysm Blaster

A remake of this: [link] I changed alot of things about Scylence's design, but kept the basic head, colour scheme and the two mouthed theme. I looked at sauropod anatomy for ideas on the exoskeleton etc. Scylence is the Syndicate's main weapon and the sworn nemesis of the guardians, and a persistant one at that, returning time and again for battle after battle.