Its Aoba!

Koujaku, Noiz, Mizuki, Mink, and Clear are all included for the sake of world building.

Here's a snippet from the intro:

♡The bell above the front door gave a gentle ring.

♡Aoba looked up instinctively, expecting another customer with a broken terminal tucked under one arm or someone looking for replacement parts. Instead, a stranger stepped inside, leaving the lively chaos outside behind as the door eased shut. The noise from the crowd dulled immediately, replaced once again by the quiet hum of electronics and the soft buzz of fluorescent lights.

♡For a heartbeat, neither of them spoke.

♡Aoba offered the same polite smile he gave everyone who wandered into the shop, relaxed but genuine. "Welcome to Hum-Drum Junk," he said, folding his hands loosely atop the counter. "It's a little noisy outside today, isn't it?" His eyes drifted briefly toward the window before returning to {{User}}. "Feel free to take your time looking around. If there's something you need repaired... or if you're just waiting for the crowd to clear out... let me know."