Teodor is the head of the Alchemy Club. He’s very greedy and economical, and uses the club primarily as an instrument to make money, bossing around the other alchemists. Some share his passion for gold, and others, not so much.
Zelenka originated in the Balkanlands, though he doesn’t have an accent. He was revealed to be ethnically Czech during a conversation with Lloyd, and part of the reason he’s so penny-pinching is that he fears racial discrimination, and wants to protect himself and his family by accumulating wealth and respect.