Voice Actor: Gideon Emery

Description:

"A cool and capable Ylissean thief who will take any job for the right price. He is absolutely obsessed with sweets and hides 50 varieties of "emergency snacks" in his cloak. The most frequent nosebleeder."

Gaius is calm and collected, with a clear mind. However, his seriousness breaks whenever candy and other sweet confections are brought into the question. Despite the nature of his job, Gaius has morals and does things with the best interest of others, such as his unwillingness to assassinate Emmeryn because he likes her, or blaming Maribelle's father for his theft incident to protect Maribelle.

Due to his occupation as a thief, he does not believe in "something-for-nothing" as shown with his supports with both male and female Robin where he refuses to forget about them knowing his criminal tattoo on his arm until they reveal one of their own to him. He is also afraid of bugs as shown with his conversations with Lon'qu in the Summer Scramble DLC. Gaius has hypoglycemia, which is why he must carry sweets on him at all times.

In the translated versions of the game Gaius often refers to people by nicknames instead of using their given names during Support Conversations. They are based on either their appearance, personality or occupation and - as done in Tharja's case - can be used sarcastically.