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Edits made...
As for the question about the Medical Core varient.
The Jihi Class Hospital Ship has been equipped with a specific variant of the traditional MEGAMI system, rather than the computer's system being devoted to the massive weapons systems on most Star Army vessel's the MEGAMI 'Medical Core' variant allocates that power to the ship's onboard medical systems in priority to what little weapons the ship has.
I figured since usually a lot of MEGAMI's systems would be devoted to weapons and such, that this variant would allocate that power more towards the medical functions onboard, since the ship lacks significant weaponry and would not need that level of system.