renni_the_bwoha
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Funny thing, in the second mission, after Markel switched to the genius machine, he decided to explore the southern sea, as a result of which Sigrif was left sitting in the boat near Nar-Erish after the victory. By the way, the victory cutscene for Sigrif didn't play for me either; I can attach the save file. (edit: if you replay the battle from the same save, the cutscene plays without any issues).