Well by the looks of things, Shin Mazinger’s Tsubasa Nishikori did have a pre-Violence Jack appearance. And the looks of things being this post.
She appeared in Gakuen Taikutsu Otoko (Guerilla High) alongside her co-stars in her Violence Jack arc. Obviously had I been able read Japanese I wouldn’t have missed it as they have the same name, but relying of visuals it’s hard to spot them as the same character. Because this version was a bikini clad, gun toting leader of a gang of mod motorcycling girls.
Apparently she also shows up up Susano-OH too, but I can’t find that appearance in what I’ve got of that series.