What Does It Mean That My Giant Power Is the Giant of Light?

(Attack on Titan + Ultraman Tiga) Char traveled to the world of Attack on Titan, and luckily found that he had the power of a titan. So I was very interested to see what kind of giant power I had obtained. "If it's a super giant, it's more valuable." "If it's Attack on Titan, it might be a bit tricky." "You can even play with a Warhammer Giant." "The Armor Titan and the Jaw Titan are barely good, but the Beast Titan depends too much on luck." "You can't give it to a giant with driving power." "What do you mean my giant power is a giant of light?"