[Matrixbeast]

Gai's death was rather well done. He didn't die in a rain of fireworks and explosions, but as a normal man, which is what, ultimately the Jetmen wanted to be. While they all embraced it, only Ryuu wanted to be a Jetman, the others wanted to live normal lives.

I think Gai's death was handled well. It was done to protect someone else, he still prioritized his friends' feelings and did his best to meet them for a special event, but he didn't betray who he was and kept it to himself, keeping in tune with his loner tendencies.
It sucked that he didn't go out in flames, but he still did die a hero.