He lost his arm during a fight with his "production" type Guyot but was revived when he met Dr. Shiyu. However his sad string of events did not end there... ... He had only one last transformation before his body dies and he used it to save Sho and the others from Guyot. In the event, Guyot destroyed Masaki's Prototyoe Zoalord crystal and he died.

Howver this was not the end of Masaki, Guyot was killed by Guyver III in that battle and his Zoalord crystal was taken away from him by Archanfel

Archanfel seeing Masaki's lifeless body, he decided to make him the 13th Zoalord and gives him Guyot's Zoalord crystal. Dr. Barcus in fear of him rebelling, fused part of Archanfel into him and thus he now takes the name, Imakarum Mirabilis.

With his new body, he was assigned to destroy the Guyvers but in the end was almost killed by Gigantic Dark.

Archanfel appears once again to save him and places him in the revival chamber which he was in when he was injured and Imakarum is soon revived just before Archanfel goes back in to deep sleep.

Because being placed in Archanfel's revival chamber he sees from Archanfel memory about what happened many billions of years ago and how the creators manipulated man into a creature of destruction.

Masaki's soul is still with him, as we see him having second thoughts as he leaves Archanfel's resting chambers.


My Comments
I personally liked his Zoalord design. Its cool and very nicely designed. As for this character, we see yet another person out for revenge. But unlike Agito, he is very collected, mature and expresses a deep sense of friendship and hope to the group.
Do note that he is not under the control of Archanfel but he is doing it because of some other deeper reason that we do not know... ...
It is said that he was fused with part of Archanfel but that may not be the sole case of his path change to kill the Guyvers.

Thanks to his battle with the Gigantic Armor, we can see that the Zoalord's abilities are inferior towards the Gigantic if used properly.