Professor Alba is a travelling archaeologist NPC who first appears as a support character in the First Chapter. At the end, he was revealed to be Georg Weissmann the third Anguis of the mysterious Ouroboros organization, and serves as the major antagonist of the Trails in the Sky trilogy.
The Third Anguis and chronologically the first Anguis of Ouroboros that appears in the trilogy, he is called "Professor" by his comrades. Not only he is the mastermind behind all events on FC and SC, but he is also the one responsible for the Tragedy of Hamel, which triggered the Hundred Days War .
He possesses the power to manipulate people's memories and hypnotize them which he uses on many people to do his dirty work (two of his victims were Joshua and Richard). His wand was granted by The Grandmaster and has the power to control space for attacks. At the end of SC he absorbs the Aureole and transforms into a massive monster called Angel Weissmann. After the last battle in SC, he manages to escape by using a teleport, but later is killed by Kevin using The Stake of Salt to turn his body into salts. His wand which contains the Aureole is retrieved by Campanella.
Because of his actions to fulfill his experiments and plans, he is hated by his comrades to the point no one (except The Grandmaster) seems to mourn his death.
Throughout FC and SC he is working to fulfill the Gospel Project, and believes that it is a large-scale plan to force mankind to evolve and gain absolute knowledge and intelligence. However, he is actually being used by the Leader and the project is actually just to obtain the Septillion of Space, the Aureole, and is just the first step of something called the Orpheus Final Project. With it obtained, the Gospel project is a great success and the Orpheus Final Project is able to move on to its next stage.
- The Alb he wears as his anguis status is a garment worn by members of the church.
- Due to his demise, his Anguis position was hinted to be replaced by a certain female alchemist.