So, in my latest comic, there's a panel of Thailog and Shari playing Chess, and there's a painting behind them with some Japanese writing.

Finally, just a few hours ago, ~
DeathFrost posted the translation to ぴかぴかる夕闇 in the comments.

It's Twilight Sparkle!
Really, what's not to love? She's incredibly smart, powerful, and if she existed in the same universe, Thailog would totally use her for his own gain.
Many, MANY thanks to *
revulo for the translation to Japanese! We gotta add more easter eggs.
And also many thanks to those people who tried to figure it out. Hope you had fun! Now you can be content in the knowledge that Thailog loves that pony, in my comic-verse anyway.

Canon-verse, well... that's another story!
And for the record, Fluttershy is the one who frustrates him the most, to the point of yelling at his CRT monitor...
Now, I'm off to resist the temptation of drawing Thailog with Twilight...