Rock-Paper-Scissors is a very simple game, and a lot of psychology goes into its play. Stephanie Dora loses because she gets lost in analysis of her own strategy, and doesn’t consider the fact that Sora has a pretty good idea what it is. She fails to figure out that he had it all figured out, and loses. But the win isn’t particularly impressive (and Steph’s inner strategizing goes on a bit too long for my taste), because as Sora says: there was no way she was going to win; she’s just too emotional and easily riled.
She was also coming off a fresh and devastating loss to Kurami and wearing nothing but a sheet over her panties, which couldn’t have helped her confidence. Sora may not have gotten a challenge, but he didn’t want one: he merely used a bet with Steph to test the power of the ten pledges. When he commands her to fall in love with him, she falls under his spell, but only intermittently. I liked the idea of the pledges being that ironclad, but it stumbled a bit in execution, Steph’s constant smashing of her head against things in an effort to shake off the spell got a little old after a while.
That being said, I appreciated the manic energy both Hisaka Yoko and Matsuoka Yoshitsugu brough to Steph and Sora, respectively. Lest we forget, Sora’s not a normal human being, nor is Shiro; a point beautifully reinforced when they grow too far apart from one another. That intense co-dependence may make a future romantic pairing between Sora and Steph a bit tricky, but on the flipside, their absolute trust in one another makes them such a powerful gaming duo, Steph starts to believe they could be the key to saving the kingdom of humanity. More to the point, Sora’s thinking big, aiming squarely at the throne.