Kırmızı Şeytanlar is a long-established organised supporter group associated with Mersin İdman Yurdu and the red-and-navy football culture of Mersin.
The group is known for organised matchday backing, away travel and supporter campaigns aimed at protecting and strengthening the club.
Kırmızı Şeytanlar remained highly active in 2026. The group organised public action during the club’s financial and administrative difficulties, launched a large signature campaign in June, and in August called on supporters to provide financial support and buy season tickets as part of its ‘Vefa Sezonu’ campaign.