Most of the main characters on "Avrupa Yakası" are members of the "Sütçüoğlu family". Scenarist Gülse Birsel portrayed the character of "Aslı", while Gazanfer Özcan was cast as Aslı's father, Hümeyra as her mother, and Ata Demirer as her brother Volkan. At the beginning of season 3, Ata Demirer made it known to scenarist Gülse Birsel and producer Sinan Çetin that he wanted to leave the series and so he did by the end of the season. He later returned to the series in season 6. Out of the main cast, Hümeyra left the main cast after season 5's finale. The other characters leaving at the Sütçüoğlu residence were portrayed by Hasibe Eren and Tolga Çevik who joined the cast in season 4. Tolga Çevik continued to remain in the main cast throughout seasons 4 and 5, but later as his program "Komedi Dükkanı" began to air TRT 1 he left the series. Following Gazanfer Özcan's death on 17 February 2009, Müşfik Kenter and Gönül Ülkü joined the cast as parents to Hasibe Eren's character Makbule.