Jose from Σαββατογεννημένες/Women-Born-on-saturday, is a guy from Uruguay working in a greek tourist shop. He's afraid of babies, he's canonically bi and he works in a night club as his second job. What he really wants is citizenship of a country. He may dislike Greece but if it can give him citizenship, then so be it.
Thiramenes was an Athenian politician. Etc important history. He's known among the teenagers who have ancient greek class mostly for his forced suicide and his last words "This is to the health of the handsome Kritias" as he drunk the conium
Andreas Kalogirou a villain from Πάρα Πέντε/ At the nick of time, a dangerous man and assassin hired by the main villain of the series to kill several people who stand on his way. He has attempted to murder the five protagonists several times with no success. He is referred to as "the man in black". He is usually followed by his friend and partner in crime Nikos Kalathas.
I mean they all have an issue with being second place, despite feeling like they’ve been second place all their life. They’d be the perfect family, or just perfect menaces to society.