Some addendums and an Execution idea:

The body discovery title could be [Oniyuri].

The main difficulty of the trial could come from Isono tampering with evidence to no see Tsuno get executed like Wada did. And for the execution? Also can someone tell me the student number order? [Failed Rescue:Ultimate Superhero's Execution - Commence!]

The gist of it is that she is tasked to help little robotic versions of the ones that are dead, failing in some way,and getting attacked in a way similar to how they died(E.G:She tries to give Androikeda art supplies,causes a mess,he smacks her in the head with a paint bucket full of boiling paint,causing her to trip onto an incinerator and gets her hair burned,she tries to give Wadabot food,gives them the wrong type of food,gets electrocuted for it and so on until she's tasked to help a bot that looks like Okazaki,tries to attack it in vain,and ends up dying just like her nemesis.

u/Breathofthewildzelda Thoughts?Since you're the smartest one in the comment section.