[With as closely as Sephiroth was monitoring various positions during the battle, he would most likely recall that Chiaki was on the team of people assigned to hack the Ultima Weapon. Considering Palitutu ended up with it in the end, she was feeling a lot of guilt in the aftermath too. Whether he finds it heartening that no one held that against her - even among the Heroes - is up to him, but it might be a comforting thought.]

When I was salvaging parts, there were some crystal fragments leftover that wouldn't have been useful for much else. I only needed a little bit of power for something this small and simple. Engineer helped me make sure the construction and energy flow were stable, and with Programmer I was able to add the necessary details to enable simple interactions with the monster inside.

[Which is to say, the mun is sort of making a lot of the actual science up on the fly. Making these things was approved, but not with much specific detail.]