The guyver units are programmed with titan formula, using the living armour administer the titan formula and pass down the titan shifter abilities. The abilities of the beast titan, attack titan and armoured titan.
The creators used their technology to steal it from another universe and use on themselves. After tests on humans and guyver unit hosts, they combined the two, prompting them to leave the planet and take the unit back. The formula leaves with the unit as it becomes a fundamental part of the unit biology. Their technology allows them to create new titan formulas and make new titan forms.
Each unit host has a titan and human form, most commonly using their unit to activate the titan abilities and form. The titan form can be activated separately with self-injury drawing blood. A naturally sized (human) guyver unit is possible but difficult to control. There is more control when in titan unit form. The host must be careful of their surroundings when in titan or titan unit form.
They are never found on earth, thankfully.
Guyver unit 1 has the attack titan formula, enhancing the hardening ability and power boosts given to the shifter. The base abilities when boosted are enhanced to double the power and force. Their gravity orbs create a gravitational pull on anything around them, this much be used very carefully to not form a new planet on the planet they stand on. Their elbow blades use electrical fields around the blades to make wounds worse. The electricity burns the wounds till smoking and shocks the wound. The megasmasher can flatten cities in seconds and takes 40 minutes to charge up fully.
Guyver unit 2 has the beast titan formula, enhancing the super strength and animal based form that the shifter chooses. The base abilities are changed to suit the titan form, and weaker at times compared to the 1st unit's power. The gravity orb is incredibly weak and can only effect a one item the host aims to lift, this increases the host's strength overall. The claws and elbow blades vibrate like normal. The megablasters are incredibly weak and little more than a scratch to the other titan unit hosts and can only melt copper.
Guyver unit 3 has the armoured titan formula, enhancing the armour and blows given from the shifter. The elbow blades are shorter than armours and ineffective close range due to the length. The armour is double that of diamond and impossible to harm and devastating to be hit by. The megablaster takes longer to open and charge up but is very powerful.
Low key would be TERRIFYING and this just an idea, so yeah.
Enjoy!