If there was anything close to a "lovable super villian" in the FGC, that would be Marn. An infamous, highly-skilled veteran player, Marn continues to show how a distinct personality and an extreme understanding of fundamentals can win over even the most disgruntled critics.
Even though Ibuki is a well-trained ninja, she is still a normal teenage girl, and states on several occasions that she finds her ninja garments ugly and her daily training strange. She also has a typical interest in boys; in several of her win quotes in Super Street Fighter IV, she evaluates her opponents based on their looks, behavior, and clothing, as well as their fighting performance. She regards Guy in particular as quite a hunk, though she also complains about his non-traditional ninja garb. Ibuki is also very conscious about her weight, as mentioned in her Street Fighter X Tekken winquote against Bob and her Arcade mode ending in Street Fighter V.
Mika is a sprightly, beautiful girl who prides herself on going all out and wowing the crowds with her wrestling moves. Her performances can be a little rough around the edges, but she definitely has the potential to enter the pro circuit. She idolizes Zangief and considers his way of fighting as the ideal route for herself. The mask she wears around her eyes can sometimes make it difficult to tell what Mika is thinking or feeling, but she is very open about her emotions and speaks in a distinctive manner.