Gaius is a hero in Fire Emblem Awakening.
Gaius is a thief living in Ylisse and will do any job if paid the right price. He loves sweets and has candy hidden all over his body.
Gaius was hired by Validar to help assassinate Emmeryn, but under the pretense of stealing from the treasury. Upon discovering the true plan of the raid, Gaius talks to Chrom and asks to be hired by him. Though Chrom is not too sure, he accidentally drops a satchel he received from Lissa earlier. When he asks about the contents of the satchel, he is elated to know that they are filled with sweets. He willingly decides to join Chrom's army, as long as he can have that bag of candy and ask Lissa if she has any more.
After the war, Gaius' sweet tooth never faded, and he returned to his old ways of thievery. Tales of "Sticky-Fingers Gaius" become popular in taverns.
As revealed in his supports, he is good at making things by hand, like jewelry and embroidery, and also is good with housework. His support with Olivia also reveals that he enjoys baking his own sweets. Gaius is also very open to criticism, using any feedback people tell him to try and improve his skills further.
Gaius is a practiced liar, a trait fitting of his profession. In one of his supports, he details that he prefers older women ("A poised woman that has class and bearing, but knows exactly what she wants"), but though his description seems very convincing, he later reveals it had been a lie.
His support with Maribelle reveals that he once tried to ruin her father's good name; he snuck into the royal treasury to frame her father for a crime, which placed him on trial (though he later reveals that his hand was forced with the threat of Maribelle's death and his own imprisonment.) He's been trying to "atone" for what happened since then. In Gaius's support with the Avatar, he bribes them to keep secret about a criminal tattoo imprinted on him after getting caught in a heist, despite their protests and assurances that they would keep quiet. He explains that he does not believe in "something-for-nothing", and refuses to forget about it until the Avatar decides to share a secret of their own. He also is not very fond of bugs. his hoshido counterpart is asugi