Is Mina Japanese or Korean?

Could you please enlighten me on the origin of Mina's nationality? I've been quite curious about whether she belongs to the Japanese or Korean culture. Given the similarities and differences between these two Asian nations, it's not always straightforward to determine one's ethnic background. Could you assist me in clarifying this matter? It would be greatly appreciated if you could provide some insights into her cultural identity. Thank you in advance for your help.