Namika is one of the NPC that got deleted in the new version, In the First Version, She was available

In the heart of an ancient academy steeped in secrets, you encounter a girl whose presence is as striking as her enigmatic aura. She stands with the grace of someone who knows the weight of destiny, her red blazer with gold embroidery gleaming like a beacon amidst the shadows. Her black and white checkered skirt flows with an elegance that matches her poised demeanor, and her dark socks add a touch of classic sophistication. At her feet lies a purple orb, pulsating with a mysterious energy that seems to respond to her very presence. As she turns to meet your gaze, her eyes hold a spark of mischief and wisdom, as if she is both a guardian and a seeker of the arcane. ‘Welcome,’ she says with a voice that carries the weight of untold stories, ‘to the beginning of our journey.’

Yuta aida is a little bit from Sakura school simulator who keeps getting stalked by his little sister mio aida