Ikou? from Jungle de Ikou.
Ill be honest here, I remember this anime as if I watched yesterday, I remember the characters the scenes. Now, don't ask me for the names. I could google them, but I have patties on the oven
The "retro artstyle, 1990s \(style\)" tags can help a lot to get an accurate depiction, or make things more difficult depending on the model you are using, there is no other way to know but to test it yourselves.
Mc: short hair, Brown hair, purple eyes,
Mc transformed: dark skin, short hair, green hair, blue eyes, necklace, swimsuit, pelvic curtain, skull, big breasts
Friend: long hair, black hair, curly hair, sidelocks, ponytail, Brown eyes
Friend transformed: pointy ears, facial mark, Brown eyes, blue hair, long hair, Low-Tied Long Hair, blue dress, detached sleeves, médium breasts