It's great to see some trans visibility ANYWHERE, and in video games is one of those places, especially since it's such an interactive pop-culture based form of media. I can understand that people are not always super up-to-date with appropriate language within the LGBTQIAAP+ community. The trans community can be especially tricky to accurately name and define, since there are many identifies within the "trans umbrella" so here are a few tips to help you understand vocabulary in the trans community:
--Try to use transgender rather than transsexual. Many people who consider themselves transgender reject the term "transsexual" because it implies that one must seek sexual reconstruction surgery to be considered the gender they desire. Remember, gender is mental while sex is physical. A person who has a penis may be considered a male in terms of sex, but if they consider themselves to be a female, their gender is female.
--Let others define themselves before you do. Don't make assumptions!
It's important to hear others tell you what they define themselves as rather than you telling them. Don't be shy to ask if you're unsure, many are okay with the question. You can try asking someone to tell you about themselves to learn about their gender identity. If you want to be more direct, ask if they have a preferred gender pronoun. Some people prefer the term transsexual to transgender--let them tell you.
Here are some iconographics to help understand
Poison stars in the Final Fight and Street Fighter video game series. She is officially described as a 'post-op transsexual' but not in Japan. According to the Japanese designers of Street Fighter she simply tucks her business away to look female.
Bridget - Guilty Gear XX
Bridget shows strong determination when it comes to proving himself as a man in Guilty Gear XX. This confident transsexual prefers to correct others when they mistake him for a girl. Unfortunately they don't see him as a serious threat and simply regard to him as an annoyance.
Naota Shirogane - Shin Megami Tensei: Persona 4
In Persona 4 the gender of the young detective Naoto remains a mystery at first. You eventually find out this female dresses as a boy to gain the trust from the police. If you go down the romantic route with her, Naoto asks if you prefer her with a low or high voice.
Kainé - Nier
Kaine is a female-bodied character with a penis. According to the mythology of Nier, she became a hermaphrodite after being possessed by a demon. Kaine's attitude is manly but she emphasizes her female qualities through a racy fashion style.
Birdo - Super Mario Bros. 2
Birdo is considered to be the first transsexual in gaming. In her first appearance in Super Mario Bros. 2, Birdo was described in the manual as such... "He thinks he is a girl and he spits eggs from his mouth. He'd rather be called Birdetta." After confused reactions by gamers Nintendo decided to scrap this line in later manuals. Even if she is considered a full fledged female by Nintendo ... we all know her little secret.