Trinity Seven - ep10

The first half of the episode focus on Arata's new transformation and how it has changed him. Although it does help in neutralizing the threat that Ilia poses by freeing Sora and taking control of this world that they are trap in. However they have a greater problem with turning Arata back, which turn out to be simple with Mira rejecting this new Arata. That through this action Sora is given the opening she needs to return Arata to who he once was. Now that Arata's back he effortlessly forgives Ilia for all that she has done, and wants to thank her for all that she has done for him in the past since she took care of him when Hijiri couldn't.

That cause him to request her help in freeing them of this world but as things turn out there is nothing she can do now since Arata usurped her control when he transformed. Although Arata doesn't have skill to bring them back so instead he set out to destroy the black sun he create that with it destruction it will destroy this world and return them to the true Acadmey. In this Arata does most of the heavy lifting with him combining Akio and Lilith's branch of magic, while Ilia stabilizes his magic because it is unstable in his weakened state. Then Sora and Mira strength his magic further by adding their own magic to his and with this combination attack it returns them to their world where the others are searching for them.

Then while Arata is recovering he is visited by Hijiri and they have a heartwarming reunion until she tries to kill him. Although Lilith manages to interrupt her which leads to Hijiri taking things up another level by transforming into a demon lord. That it is through Hijiri that we learn what the Astral Trinity is and why she is able to retain her since of self while Arata lost himself in the power it granted. First it is a power that is born from mastering all of the branches that are related to their sin. In Hijiri's case its collapse, creation, and dis-assembly which are the three research themes of wrath. That this is why it is referred to as a trinity. This is also why Arata went out of control is because he wasn't ready for that level of power that transcends Magus mode which is the manifestation of a single theme from their sin while Astral Trinity is the manifestation of all three.

Now with the realistic threat that Hijiri poses it look like they are finished but they are saved when Arata summons Arin. Although the question is why is she summoned when he calls Hijiri's name, which raise the question of what is their relationship to one another. Then through summoning her Arata grants her a special spear that allows Arin to void Hijiri's attack. However this whole meeting seem like it is exist only to allow her to tell Arata about what Iscariot is doing and if they don't hurry back Royal Biblia Acdemy is going to be destroyed like this one was. Which sets their course for the next episode as well as the finale but the question is how much help is Arata going to be in his current state.