Is Tac Nayn a girl?

Excuse me, but I'm a bit confused by your question. Are you referring to a person named Tac Nayn, and are you asking if they are a girl? If so, I must admit that I'm not familiar with the individual you're referring to, and as such, I can't definitively state whether they are a girl or not. However, it's worth noting that gender identity is a personal matter, and one that should be respected and not assumed based on names or appearances. If you have access to information about Tac Nayn, I encourage you to use it respectfully and to avoid making assumptions about their gender identity.