of Mithril's submarine Tuatha de Danaan. She's very young for her position, only 16 years old, and has a crush on Sousuke. Tessa maintains an optimistic outlook that she can make a difference in the world. She is stubborn and will try her hardest to prove wrong to those who tell her she can't do something. Still, most of her crew sees her as someone who never got her hands dirty on the battlefield and therefore can't defend herself. Kurz Weber appears to be a typical ladies' man and often offers Sousuke advice about life and love. He is laid-back, but will not avoid responsibilities. He is regarded as one of the finest snipers in Mithril. Melissa Mao is the superior officer of both Sousuke and Kurz. She is a spunky woman who loves beer, smokes a lot, and wishes she could be free-spirited and optimistic like Tessa. She was originally a member of the Marines, signing her recruitment contract on the day she was supposed to marry a businessman that her father had pushed onto her. Eventually, she left the Marines and joined Mithril, where she met Kurz and Sousuke as new recruits. The two were downplaying their skills intentionally, but she saw through their ruse and picked them out to be her teammates. Gauron is Full Metal Panic's main antagonist, a twisted and violent mercenary deeply involved in the black market and global terrorism. Despite possessing an extremely vile personality, his ruthless cunning and mastery of the Lambda Drive system make him a force to be reckoned with on the battlefield. In combat, his vehicle of choice is the super AS called Venom. Mithril Andrei Sergeivich Kalinin Andrei Sergeivich Kalinin () is Sagara's commanding officer and one of Tessa's military strategists with the rank of lieutenant commander, fulfilling the role of Operations Director. He is also the foster father of Sagara. He and Sousuke were once enemies, as mentioned in a two-part episode by Sagara himself. The foster father status may be on the school's official papers only, but Kalinin is certainly a very fatherly figure to Sagara. Kalinin was formerly of the Soviet special forces – Spetsnaz – and was the leader of the team that found a crashed Japanese airliner. There was only one survivor: a three-year-old child by the name of Sagara Sousuke. His wife is deceased and the whereabouts and status of the rest