12 titles recommended if you like Twin Star Exorcists
Ayakashi Triangle
The Testament of Sister New Devil
Tokyo Ravens
Soul Eater
The Kingdoms of Ruin
Chained Soldier
Yuuna and the Haunted Hot Springs
The Reincarnation of the Strongest Exorcist in Another World
Blue Exorcist
Engage Kiss
Daemons of the Shadow Realm
Vermeil in Gold