Do you want their names to appear when you hover over them? You can follow this code:
[acronym="THE CHARACTER'S NAME GOES HERE"][img]THE IMAGE'S URL GOES HERE[/img][/acronym]
Here are all the sprites I have so far:
19/04: Woozi added.
17/04: Bones added.
31/03: Two new sprites of Kaito (Shigure, Violet) and Luka (Swimwear P, Fresh Star) added.