|Game|| Tales of Symphonia|
|Age|| 12 (TOS)|
|Height||141cm → 151cm|
|Weight||29kg → 40kg|
|Character Designer||Kosuke Fujishima|
|JP Voice Actor(s)||Ai Orikasa|
|EN Voice Actor(s)|| Colleen O'Shaughnessey|
Genius Sage (ジーニアス・セイジ Jīniasu Seiji?, Genis Sage) is a main character and a male protagonist in Tales of Symphonia. He is the male deuteragonist of the title. He is Lloyd Irving's best friend, the younger brother of professor Refill Sage who teaches at the local school where he attends in their hometown of Iselia. Genius is very studious, being a child prodigy, the smartest student in the village and having an exceedingly high level of intelligence. He is also outstanding as a practitioner of magic artes and as a cook. The Sage siblings initially claim to be full-blooded elves. Due to being smart, he is quick to judge in his and other's abilities and decides to travel with Lloyd and Collet Brunel with their journey throughout Sylvarant. He is seen as mature by those all around and is considered an adult in many senses, and can change between an adult or childish demeanor. As Lloyd admires this part of Genius, Genius also admires Lloyd's strong character.
The Sages hide their mix of human and elven blood because of the negative views created from the world's system, full-blooded elves neglect them and humans view them as part of an evil organization which has an impact in the story. His exceptional skills and talent may also be a result of him being a half-elf, a mixed race of humans and elves with a proficiency for intellect, magical prowess and long lifespan—of which are easily discriminated against. In Tethe'alla, the Sage's race were revealed and accepted by the party.