User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-1.53.124.174-20150712141105/@comment-1359322-20150712150926

Euclid didn't appear in the Kuoh Town in V17 at all. He appeared in Tokyo when Ise and Rose are on their "date" and merely asked Rose to join them. Plus they didn't even fight since their surroundings were full of normal civilians.