The part where the werewolves show up is Norio Shioyama plus some more crowd shots and the chariot that look an awful lot like him were probably him because they were never corrected by Yas. There’s also a scene later on where Poseidon’s soldiers accuse Arion of killing Poseidon which I’m told he drew because they look completely different to the rest of the characters. Unfortunately they’re not uploaded here.

https://w.atwiki.jp/sakuga/pages/774.html
アテナ軍対ポセイドン軍の乱戦シーン（オオカミ人間が戦っている辺り）と、プロメテウス対エリヌースの剣戟シーン。（「ロマンアルバム・デラックス66　アリオン」より）