STEINS;GATE×Sanrio Characters: Chance Encounter of the Goldig Party

After botching a quest to stop a rampaging dragon and not scoring any loot you’re back farming slimes in a low level dungeon. Thankfully some adventurers come by looking to party up with you since you can’t cast offensive magic and are stuck with support spells. Unfortunately, they are an annoying lovey-dovey couple trying to have some risky outdoors fun.

Slogging through the dungeon is a pain, enduring the awkward flirting of the girl throwing herself at the unresponsive div of a boyfriend. Your only reprieve is boring combat against weak slimes. Eventually the group stumbles upon a room containing a magical grimoire and before Mr. Boyfriend enters you chant a cheeky spell trapping yourself and the clearly inheat beastwoman alone in a room together, and wouldn’t you know it she totally buys the whole “looks like this room was rigged with a magical trap that won’t open until the people inside have sweaty, intense, mind-breaking sex!”

Now, with the beastwoman, Anne, wrapped around your *finger*, why stop there? Use your devious mind and strange magic to fill out your new Oppai Party! Someone to tank backshot after backshot, someone who can keep you satisfied 24/7 with an amazing dicks per second rating, a healer to keep you energized for those long nights at the inn or on the road between quests.

The world is overrun with monsters!
All because of seven magical orbs buried deep within seven dungeons...
Form a party of treasure hunters at the guild and set out to claim the orbs for yourself!

Anis: Naive and positive
Nina: Cool and mysterious
Luiza: Generous and steadfast
Tina: Intelligent and competitive
Chris: Timid and cowardly

Take these girls along and advance through the dungeons at your own pace!
Items and equipment are up to you! But if you're caught, the girls will be in for a hard time...

Just like the title states. Does anyone have the sauce for this character?
 

[Auber Gine Doesn’t Need a Party Member] is a simple dungeon exploration game. You will take control of Auber’s adventure towards conquering multiple dungeons. Although each conquest grants glory, each defeat humiliates Auber and corrupts her body and mind, which transforms her appearance permanently.

So I've noticed that characters from Yuzu Soft VNs make a discreet appearances in other Yuzu Soft VNs . I figured I'd upload the evidence here for kicks and giggles.
 
Edit: April 6th 2022, 1:15 AM EST
Most of these pictures so far are from Cafe Stella since that's what I'm reading right now, but I remembered a few other instances from other VNs and dug them up.