Stella’s first battle is over before it begins, when her lower-ranked opponent forfeits out of a desire not to be hurt too badly. When she checks in on Ikki, he’s studying tape on his opponent, Kirihara Shizuya, and his “Area Invisible” technique that’s such a mismatch against Ikki’s swords skills. He seems focused and committed, and promises her he won’t lose. And Stella, having come off an easy victory, having lost to him herself, and used to Ikki acting tough and cool, believes him, without suspecting anything amiss.
Alice is different. Her woman’s intuition, if you will, senses something is off with Ikki on this particular momentous, high-pressure occasion. She learns about how years ago there was a conspiracy to get Ikki expelled for some petty infraction, and how Shizuya attacked him brutally, but Ikki wouldn’t fight back no matter what, worried (rightly so) that he’d be kicked out for it.
Alice comes to the conclusion Ikki is so used to being downtrodden, both physically and mentally, by those who see themselves as better than him, that he’s developed a hard skin that prevents him from hearing the “screaming in his heart”—that release valve everyone has.
Now that he has to either win the Seven Star Battle or be expelled, that pent-up anguish has a profound effect on Ikki, such that he does not strike the moment that gives him the best chance at victory: before Shizuya activates Area Invisible. He can’t, says Alice: he’s too damned nervous down there.
And so, Shizuya, who is perfectly confident in his ability to hide and attack from the shadows like a hunter or assassin, has his way with Ikki, riddling him full of arrows. Ikki collapses in a pool of his own bloood, Shizuya mocks him, the crowd starts laughing and mocking and chanting “Worst One” and it’s almost a nightmare come true for Ikki, until a fed-up Stella stands up and tells the crowd to shut the hell up, and tells Ikki to stop looking pathetic and get up.
So he gets up. He puts his cool face back on. He can, because Stella’s loud public words of encouragement wash away the nerves. He calms down, then uses his trump card and steals the “logic” of Shizuya’s ability, so he can see right through it every time. Shizuya is able to switch from tactic to tactic, but ultimately they’re all part-and-parcel of his ability, leaving nothing with which he can hold Ikki back other than cowering and crying “uncle.” Ikki spares his life (by one millimeter!) and wins. Then he passes out.
When he comes to, he’s in the hospital, a dozing, drooling Stella by his bedside, his sister crying into Alice’s shoulder outside because it’s not to be for her. And since he has her alone, Ikki, who won his battle thanks to Stella, confesses to her, and expresses how important she is to him.
Her lovely dere response includes a closed-eyes first kiss and a small nod indicating she feels the same way about him. Then Ikki draws her into a big warm hug (bawww) and promises he’ll one she’ll face in the Seven Star final. You don’t get that a lot in anime these days: a couple working towards facing off against each other in the final battle. I like it!