Mikey

Background
Mii-kun is a monster of Rato that longed for power. A Hero had tried to kill him along with Rato but he managed to escape though severely injured. In order to survive long enough to one day have his body reconstructed and gain more power, he lived in a test tube in Ratos lab until Naofumi morphed his consciousness into a core (similar to dragons) and constructed an extra large Raph-race body for him.

Devil of Shield Arc
c1-78

Cal Mira Island Arc
c78-114

Spirit Turtle Arc
c115-130

Slave Supremacy Arc
c131-254

World's End Arc
c255-357

Towards the Legend Arc
c358-378

The Christmas of Shield Hero
c379-385

The Valentine of Shield Hero
c386-402

The White Day of Shield Hero
c403-409

Loop 1 to 3 - Tutorial Arc
c410-414

Loop 4 - Silt Welt Arc
c415-455

Loop 5 - Melromarc Arc
c456-574

Loop 6 - Foburei Arc
c575-current

Heroes
Iwatani Naofumi

Companions
Ratotil Anthreya