I get a kick out of sketching alternate outfits for Lelouch and C.C., but there are a handful of practical legal points I always keep in mind when making 'Code Geass' fan art.
First, copyright: the characters, names, and story belong to the original creators and rightsholders, so purely copying or reproducing official art for sale can be risky. I try to make my pieces transformative—adding my own twist, commentary, or mash-ups—because that strengthens an argument for fair use (or similar doctrines outside the U.S.). Even then, fair use is not a guarantee; it’s context-dependent and decided case-by-case.
Second, commercial use raises the stakes. Selling prints, using print-on-demand, or taking commissions requires more caution. Some studios tolerate doujin-style sales (especially in Japan), but international law varies. I usually include a clear
disclaimer like "fan-made, not official," avoid using official logos, and consider contacting the license holder if I’m planning large-scale sales.
Finally, respect trademarks and moral rights: don’t copy protected logos or present fan work as official. Know takedown procedures (DMCA in the U.S.) and keep records if you get permissions. Personally, I err on the side of creativity and transparency—keeps my conscience clean and my stash of prints sellable at conventions without drama.