Moon Cancer (Fate/Axiom ~ Pachacuti & Ramesses II)

Moon Cancer (ムーンキャンサー, Mūn Kyansā) is a mixture between  and, in an attempt for  to create the "Ultimate Servant". However, because of certain complications during the summoning, Ramesses had to be given a sealing designation that sealed the majority of his powers. Ultimately being deemed a failed experiment, Moon Cancer was moved to the Yggdrasil Complex, joining the Z-Team as one of its members.

Moon Cancer is one of the main protagonists of Fate/Axiom.

Class Skills
Because of its unique composition, Moon Cancer's Skills are mostly separated between Pachacuti and Ramesses II.

What is perhaps their most important Skill, however, is the Class-Skill Permeation, holding it at the ranking of EX. This Skill is a of a higher order, allowing for them to possess Skills from their other classes, where those classes act like a sub-class to their current class. This Skill also allows for Servants to freely alternate between who is in control over the body at the time, changing their Parameters, usable Skills and Noble Phantasm(s). Due to holding it at such a high level, it is possible, with a greater mana expenditure, for both to control the body at the same time, allowing for unique combinations in skill sets. The one that is in control over the body is seen as the "Active Servant", while the one that isn't is considered to be the "Inactive Servant". The Inactive Servant can still speak to the Active Servant via their Mindscape, acting as a secondary pair of eyes, as the Active Servant may not notice certain things the Inactive Servant may be seeing. This also accounts for reaction times, giving them a sort of advantage if the Inactive Servant can take over the body in time and react differently. Due to their unique composition, Pachacuti and Ramesses can use the Command Seals the body possesses, whether on their Servants, or even on each other. It should also be noted that due to this Class Skill, Pachacuti and Ramesses can exist as this peculiar mixture.

Trivia

 * Moon Cancer uses the design of Broly from Dragon Ball Super.