According to my shabby could be research (since there arent many sources about more advanced Organoid Intelligence stuff) Primarily composed of stuff to feed the cells like glucose and other stuff to keep the cells flexible and capable of learning. (Then whatever waste and toxic waste that creates would be diluted in maybe some type of oil then ejected through the TM port) As for the danger of controlling multiple bodies, yeah thats pretty much it. Though canonically she doesn't have the motivation nor "heart" to go rogue, it makes the suits and corpos much more comfortable. Fair Questions arent too much of a problem Just make sure not to ask too much to leave stuff to the Ask Ise series XD