Otonashi is mostly buying time. Amnesia is common among new arrivals, but memories return eventually. He'll wait until he remembers who he is before he really decides to stay with this group.
They prepare their next mission: to steal cafeteria lunch tickets.
The plan goes like this: the distraction squad will put on a rock concert, then, at the height of the concert, they'll activate a giant fan, blowing all the lunch tickets in the cafeteria out where they can grab them.
Too bad she's invincible. When she comes up against him, she can parry his bullets. When the others back him up, she activates a shield that deflects them.
They buy enough time for the operation, but deal basically no damage to Angel.
Ever hear the phrase <better the devil you know>? Naoi, the vice-president of the student council is now acting president, and he's even tougher than Tachibana. Plus he's an NPC, so they really shouldn't go after him.
Otonashi reaches out to Tachibana, but Naoi imprisons them.
Tachibana had developed a skill to clone herself, but had failed to put any limit on the clones. She activated it in battle, and the clone of her was made with the will to fight. Then the clone made more clones.
Yuri hacks Tachibana's computer to change the skill to reabsorb.
He was my injured internally in the crash, and though he organized all the survivors and bandaged their wounds, he did not survive until the rescuers arrived.
The last thing he did was fill out his organ donor card. He couldn't become a Doctor, but he at least saved one life.
(I elided Yuri's horror story, which was told earlier.
Invading robber/murderers killed her younger siblings in front of her to incentivise her to reveal her parents' valuables. She didn't know where they were. The authorities arrived only after her siblings were all dead.)
But really, what Yui wants is to feel like she's not a burden. Like someone wants to be with her, instead of being stuck with her. Someone to love her and marry her.
Hinata steps in, weaving a tale of how they could have met and fallen in love while alive.
Yuri has basically never been fooled. She calls out Otonashi to explain his theory to the rest of Battlefront, then lets everyone make their own decision.
Meanwhile, she investigates. Whoever is controlling the shadow monsters has reprogrammed the NPCs.
As shadows flow around her even in the fantasy world, Otonashi reaches out for her. The last fighters have followed her underground, and they're pulling her back.
Falling in love should be an auto-exit, but he was trapped here. He created the shadows so he could become and NPC.
It is Yuri's love for her friends that has triggered the failsafe. But she is here in the core now, and can take control and become God if she wants to.
Yuri declares an operation: everyone should pretend to be in high spirits all day. When they don't vanish, this should confuse Angel so much that she calls God over the irregularity.
Now, this isn't a comedy, but in a way it's a comedy of errors, in that most of the conflict is driven by the misunderstanding that people are on different sides when they're really not.
The Yuri/Angel conflict is mostly confusion as to what their goals actually are.
And that fight is, ultimately, unresolvable. Yuri can forgive herself for not doing the impossible, but she can't forgive God for making the world cruel. And she doesn't have to. The metaphysics here are such that it's her own heavy heart that keeps her here.
It's probably better than having an actual showdown with God. _The Devil Lady_ could pull that off, but it's super risky. It's very easy to have a broken moral or metaphysical story, and I think _Angel Beats_ is better for choosing not to go there.
Tachibana is a tiny little thing, but it's amazing how threatening someone can be when you give them the _Terminator_ treatment of being slow but unhinderable.
An excellent choice, especially given that she gets rehabilitated (in the audience's eyes) later.
Yuri goes on to confront the architect... and it's nobody. Just an NPC, programmed to do this if things went wrong.
And what went wrong? Love.
The initial author of the Angel Player system had fallen in love with someone who passed on.