@lydia's profile pic is Himiko Toga from My Hero Academia, so I chose a monster that roughly resembles her, namely Fortune Lady Light — https://yugipedia.com/wiki/Fortune_Lady_Light —. For the other details, however, I focused on this user's personality, and her ability to face hardship but still remain light-hearted.
*
It's kind of funny, when I did the PoGo Project, she requested an Absol, which is not a very light-oriented mon. Perhaps she would have preferred a monster similar to said mon.

But do they know the way to San Hosey?

"Infiltration complete."
- Agent Froggo

I known @creativedragonbaby wanted a Digimon, but this series sort of has a theme. Then again, who knows? *wink*
*
Yugioh has a slew of cute dragon baby monsters to use. Given her profile pic, I did consider Rainbow Dragon — https://yugipedia.com/wiki/Rainbow_Dragon — for example. But ultimately, I had to go with the classic Baby Dragon — https://yugipedia.com/wiki/Baby_Dragon —, one of Joey Wheeler's classic cards which, though not powerful, accompanied him always, just like how our dragon baby does for us.

I really hope these posts keep going until May the 4th.

Oh the pixelated, blocky carnage!

It's strange that Yugioh has a ton of monsters with oppai, and more than a few loli monsters, but no actual @oppailoli monsters (at least none that I could find). So I just used one of my favorite female monsters instead: Thunder Nyan Nyan — https://yugipedia.com/wiki/Thunder_Nyan_Nyan —, who is both cute and, um, not lacking. I also tried finding a monster that has some connection to the character in this user's profile pic, but for the life of me, I couldn't figure out who she is, and reverse image search turned up nothing. Truly their tastes are esoteric and refined, and I can certainly admire that.
*
Also, welcome back! It's nice to have our resident Japanese expert around again.

That doesn't make them shallow though.

The power to control octopusses with but a flick of one's finger is not granted to any mere mortal.

"Of social distancing, please."

Is that your little friend inside? Should I say hello?

@dr_richard_ew is no doubt doing some important research. That's the only reason he would gobble up others, I'm certain.
*
As for the monster used, it's Magical Scientist — https://yugipedia.com/wiki/Magical_Scientist —. Much like our resident mad scientist, this card was insanely impactful when it came out, enabling one of the best known OTKs (one-turn kills) of the game. As such it's been on the Ban List almost consitently. And of course our own doctor is just as if not more magical, and probably better looking.

No one ever expects an attack from (or on) the rear.

Military, check.
Industrial, check.
Complex, check.