Aliasing shishioh_guy -> shishiou_gai
Aliasing guy_shishioh -> shishiou_gai
Reason: Correct romanization of 獅子王凱（ししおう がい）.
The above are the most common permutations of his name, as used in the fan community.
The "Guy" spelling is rather common, even in official materials (see this page from the official side-story manga), so there may be significant confusion on this matter.
Updated by a moderator