May: Neither, I think standard teas would be too boring for her and most coffees too bitter for her sweet tooth, unless she pours a bunch of sugar and cream in it. Not to mention, I hc her with ADHD, so she wouldn't be affected much by the caffeine. She'd be more of a hot cocoa or fruity drink enjoyer instead. Mod Celeste says that boba tea would probably strike her fancy!
Zuke: A tea guy for sure, though he also enjoys coffee sometimes. Mod Nine thinks he'd like green tea! At least he doesn't have to worry about May stealing sips of his drinks like she does with bites of his food.
DJSS: Everyone knows coffee is a scientist's best friend! I'm kidding, but I can totally see him watching the stars at night with a cup of strong coffee in hand; he wouldn't want to doze off and miss any shooting stars. How he drinks it is a mystery.
Sayu's crew: They give me boba tea vibes! They would all make boba when they hang out together. And Sayu-brand pearls being manufactured for the stores just makes sense. Sweet honey bubbles, anyone?
Yinu & Mama: I'm imagining them holding tea parties together and the cuteness is off the charts. Yinu would make little sandwiches and cookies for her stuffed animals too!
Neon J: Does he eat/drink? If he does he seems more like a coffee guy to me. He bundles up with the occasional cup for those long nights in the workshop, or as a morning pick-me-up for NSR meetings.
1010: If they eat/drink like NJ, you can bet they would be all over those trendy Starbucks-style beverages. They probably promote new coffee flavors in exchange for free drinks!
Eve: She might like latte art for its aesthetic, but I think taste-wise she'd definitely prefer tea, it helps her relax after stressful days. She likes to go to different tea shops around the city and taste different artisan blends. I could see her and Zuke bonding over various teas back in the day.
Tatiana: Coffee, a constant stream of coffee. Running a city is tiring work! She drinks it scalding hot to help her wake up and get her embers flowing in the morning.