Born in 1982, Valantis Diamantis began practicing martial arts at a very young age, starting with Vassilis Zachopoulos' Okinawa Te Tai in 1992. He then trained in Shitō Ryu Karate-do until 2000, the year he started his training in Bujinkan with teacher Filippos Matzirides. Since 2012, he continues his studies with Nonda Asproulis. For a decade now, he has been attending seminars and trainings with Kacem Zoughari in Greece and abroad, while he is also a security professional and a retired Greek Army Officer.