Sandra Equihua is the co-creator of El Tigre. She works with her husband on their project out of their pasts. Sandra is credited for designing all female characters that appears in the show, Jorge once admitted he can't draw females very well, which is why he has Sandra to do that. The character Frida Suárez is based on her. Although it is not known if any events in the show that happened to Frida was anything similar to what Sandra did or would do. She is currently an artist with her own blog.