なんかガイアの方はうまく描けてしまったので単品ver.。
量子加速機で我夢と対面するシーン、大決戦！超ウルトラ8兄弟、タイトルバックのガイアの三つを参考に描きました。
影などはもろに8兄弟ですね。

変身バンク風の背景も恐ろしく手を抜いているのですが、想像以上にうまくいって少しゲンナリ。

I ended up drawing Gaia quite well, so here's a standalone version.
I used the scene where he encounters Gamu in the quantum accelerator, Great Decisive Battle! The Super Ultra 8 Brothers, and Gaia in the title sequence as references.
The shadows are very much like the 8 Brothers.

I also scribbled a lot on the transformation bank-style background, but it turned out better than I expected, which is a bit disappointing.