Misaka 50020

Misaka 50020 (ミサカ50020号), also known as Pet Misaka, is a non-canon clone of Misaka Mikoto who appears in the Toaru Majutsu no Index parody story, Konna Saishuu Banashi wa Iyada!!.

Appearance
Like the other Sisters, Misaka 50020 looks the same as Misaka Mikoto, though her eyes are drawn differently for emphasis.

Konna Saishuu Banashi wa Iyada!!
Misaka 50020 is with Kamijou Touya when Touma encounters him, having been picked up by him earlier. When Touma asks if she is an Abandoned Misaka as well, she introduces herself by serial number, declaring that she is no longer an Abandoned Misaka and has begun her second life as Pet Misaka. She and Misaka 20002 are left behind when Touma and Touya run into a burning building to save Itsuwa. Though not thinking too much of it at first, they both look back towards the building after Kamijou Shiina points out what might happen with the two of them rushing in to save a girl.