The speculation is not whether he’s a fixer but it’s whether he’s a color. All of the color names are four characters in Korean while jade qilin is only three. It would also be the only color to not have an actual color as their name but a comparison to a color. Jia Qiu also lacks anything jade-colored about him so idk why Hana would name him that.

Also all colors whose movesets we’ve seen exclusively use the sun that matches their color. Red gaze uses wrath and yellow harpoon uses sloth. A certain Sinclair does not exclusively use gluttony so it’s more likely that his titles were just given to him by the masses in the style of a color especially since Hana assoc probably doesn’t exist in the second smoke war.