Artist's commentary
Wendy & Lucy (Fairy Tail)
Talking a bit about the muscles, dragon slayer magic is specifically one that affects the body and makes it tougher. Mashima just doesn’t give any muscles to his girls, if Wendy was a guy you bet she (he) would have some like the other dragon slayers ahah.
Meanwhile I kept Lucy intact since by concept her magic is just summoning allies and she only gets strong by herself when using variants that allows her to coat their magic on her.
Not that I would mind having her with muscles but I wanted to give some contrast between the two.
Romeo is roughly the same age as Wendy, and despite being a weakling compared to her, he has noticeable abs, for comparison.
Meanwhile even Erza who is a physical powerhouse has no hint of muscle lel.
Sources:
https://twitter.com/TheGoldenSmurf/status/1578809630037143552
https://twitter.com/TheGoldenSmurf/status/1578832611153444864
https://twitter.com/TheGoldenSmurf/status/1578832979283292160
https://twitter.com/TheGoldenSmurf/status/1578833568968896512