Want to know what would happen when lightning strikes them? Realistically?
Steel wire will attract and ground lightning, but everything that touches that wire gets shocked also.
Jumping up (and making yourself the highest point) while attached to the ground using conductive material is pretty much the worst thing to do in a thunderstorm. She's making herself a lightning rod, almost guaranteeing a full hit.
Any statement concerning water or metal being more conductive is an impossible statement right now. We don't know the kind of metal or water (if it's pure then it's not conductive at all), and the conductivity of the wire largely depends on the thickness of the wire.
Also: the resistance of the wire causes it to heat up, wires this thin will melt and burn into her skin, causing horrible burns and concentrating the elightningstrike on her body.
So what would happen if lightning strikes in this situation?
Himori gets struck, the lightning rides down trough both her body and the wires, from the wires into the ground and Abilgail.
Everything in the scene is equally wet so water isn't really an issue here.
So Himori get the direct contact damage: Enormous quantities of energy pass through the body very quickly and this can result in internal burns and organ damage, explosions of flesh and bone, and a damaged nervous system. Depending on the flash strength and access to medical services, it may be instantaneously fatal or cause permanent injuries and impairments.
Abigail gets a slightly lighter hit but is also electrocuted (not sure if she's immune or not, if she's not she's not much better off than Himori)
Even after the energy reaches the earth it may still spring back up into someone's leg from the ground, this is called 'step potential'.
So anyone closely nearby can get a shock too.
Finally there's the sonic boom from the thunderclap, close by this can cause concussions and (temporary) deafness.
tl;dr:
My prognosis?
Himori: 30% chance of death, if she survives there's an 80% chance of permanent scarring or being paralyzed. Because of the wires these scars run along every point she was in contact with the wires. The thunder should also knock her unconscious, with a large chance of permanent hearing and/or brain damage.
Abigail: Let's say she's immune to the lightning, she'd still suffer 3rd degree burn wounds from the molten wire wrapped around her. Then there's the same concussion effect from the shock wave.
Everyone watching: temporary deafness, loss of appetite due to the scent of seared flesh.
Anyone rushing into the stadium directly after this still has a chance of getting a painful static shock from the ground.