Not only are they unnecessarily sexualised, they are also extremely impractical in most cases. For instance, why would a female character with no superhuman durability to speak of go into battle with heavily armoured and massively powered opponents wearing what is essentially a bikini? It shouldn't happen, but it does happen in comic books - and it happens a lot. Of course, there are characters whose durability is such that they don't necessarily need to wear full body armour in battle but, even so, revealing 90% of their body is still unnecessary.
superhero costume party
Created by Brian Pulido as a fantasy of Evil Ernie in “Evil Ernie” #1, Lady Death has evolved over the years into a much more nuanced character. She went on to gain popularity due to her over-the-top sexuality. Now, this isn’t to say that the character is a joke and shouldn’t be treated seriously. If she weren’t an interesting character, then she wouldn’t have survived over 25 years in comics. However, that being said, she is still known for her looks above anything else. The moral of the story is to go out and buy some Lady Death books and learn a couple facts!
But some female heroes haven’t been so lucky as to get more practical makeovers. Take for example Elizabeth Olsen's cleavage-baring Avengers: Infinity War look, which Olsen says isn't exactly her personal cup of tea for a character wading into battle with Mad Titans. Even she'll admit it's a step up from Wanda's comic book look, but in her words costumes like hers aren't "representing the average woman."
If you talk to many comic book fans that entered puberty in the ‘90s, they might list Gambit as the cause of their sexual awakening. Maybe it was the Cajun accent? Or perhaps it’s the dark, red eyes? Either way, Gambit will go down as one of the all-time sexiest characters in the Marvel Universe. The character is one of the few on this list with a costume that covers almost his entire body, down to just leaving his face and hair exposed. This modesty doesn’t stop Gambit from being a character that’s known for his sex appeal.