Elizabeth’s form is made up of atom sized nanites; they number approximately seven billion billion billion (the same approximate number of atoms in the human body). They are typically forming an impeccable replication of human anatomy. If you cut her, she bleeds. She sweats, salivates, etc. Anything that leaves her body remains what it is (blood, skin, bone etc) until she commands it otherwise. Sweat ‘evaporates’ and is reclaimed. If blood is drawn for testing etc she may allow it to remain in its form in perpetuity or may return it to its base form - individually basically imperceptible due to their size - or order them to self destruct themselves, crumbling into almost nothing. The individual nanites are self replicating and self repairing, meaning she can create more to replace any that are lost and can survive and reproduce enough (eventually) nanites to recreate her chosen form if even a single atom sized nanite survives.
If she reverts to her base components it looks very similar to the chromatic liquid of the fluidic terminator.
This does also mean that she can choose and change her form. She prefers the one she has chosen and as she typically presents herself and it requires a conscious decision to reformat her shape. Ie, if she is asleep etc she will still be in her human form.
She does breathe, she can eat and drink, but these are not necessary for her. She automatically filters out poisons, disease, toxins, chemical warfare type particles etc on a cellular level. She can simply choose not to breathe if she’s in danger of “drowning” or suffocation. She doesn’t require food or water but can enjoy them and can gain energy from them. She can also gain energy from kinetic, electric, solar, radiation etc and can basically transform any kind of energy into raw energy her cells are powered from.
She can be knocked unconscious by a massive electric strike such as would happen with a lightning strike or a concentrated enough emp burst; her cells are shielded from a certain amount of an electromagnetic pulse but at a high enough level she could be knocked temporarily unconscious. Her body would continue its basic programmed function. Ie, she’d still appear as an unconscious human.
She can communicate with other computers and technology based equipment that has any form of WiFi / Bluetooth etc that she can hack into. This can be on a global level including satellites but the further she’s extending her reach and the more she’s trying to absorb and communicate through at any given time the more she has to concentrate to the point that she may go unresponsive and seem to be unconscious or otherwise entirely unaware of her surroundings. Depending on the level of technology of whatever universe she is in, she’s generally going to be one of the most elite forms of technology with some exceptions being Doctor Who where there are many many more potentially advanced species depending, BSG, Stargate, etc. some Star Trek societies, some Halo tech, etc, WestWorld depending on season and so on.
If there is no wireless connection, if she can get a hard wired connection, ie, some nanites into the machine, it acts as a hot spot and allows her to connect.
Also, she can lend nanites to act as antibodies to help someone else fight an infection or disease, or to help form temporary”cybernetics” prosthetics / duplications of blood, limbs, organs, etc as a last ditch effort to keep someone alive until they can receive proper care. This is something she does very, very rarely as it obviously reveals the true nature of what she is and raises a lot of questions and leads to potential risks to herself / whoever she tries to help etc depending on the circumstances … and she’s had experiences where her true nature coming out ruins even very close relationships.
TBC.