Imagine using Aleister Crowley’s Possibility Manifestation ability in A Certain Magical Index to bring a Lightning Bolt that passed through Superman and was about to hit Leslie Willis(turning her into Livewire) and fire it at Misaka instead.
Livewire’s appearance is her own personal choice apparently so Misaka gaining Livewire’s abilities won’t give her Livewire’s form as Misaka wouldn’t have any reason to take that form.
Now imagine that Misaka is not only hit by the Possibility of a Lightning Bolt that passed through Superman but hit by the Possibilities of Lightning Bolts from Larxene and Lei Shen that passed through a Superman unharmed by Magic…
Misaka with the abilities of Livewire(turns into pure Electricity and can go into Electronics), Larxene(can create Electric Copies of herself, Lightning Orbs and Pocket Universes) and Lei Shen(can convert Animals into Electric variants as well as create Lightning Elementals)would be the most powerful and Versatile Electricity User! The Ultimate Electricity Esper/Metahuman Hybrid!