Per wiki policy, Spoilers Off applies here and all spoilers are unmarked. You Have Been Warned.

Episode 1

Riri awakening her CHARM and helping destroying a HUGE all before her school's opening ceremony

Riri gets several throughout the first episode, despite being inexperienced.
- Kaede decides to step in the middle of a fight between Endo and Yuyu. Right as Kaede decides to butt in, Riri appears out of absolutely nowhere and stops her. Everyone is surprised on how she would be able to do that, which makes Yuyu assume that she's experienced.
- Riri joins the more experienced Yuyu and Kaede in fighting against a loose Huge. Even though Riri initially gets injured and can't really do much, she manages to instinctively push Yuyu out of the way after a Huge unleashes some smokescreen. Yuyu points out if Riri hadn't done that, Kaede would've been accidentally killed.
- Riri's CHARM transforms into a giant sword and she manages to help Kaede weaken the Huge to let Yuyu finish it off. Afterwards, Riri instinctively shoves Kaede into a pit to save her.
Yuyu and Kaede are no slouches either. Yuyu actually helps Riri with her CHARM while Kaede manages to fight off some Huge.
We get to see a CHARM transformation courtesy of Endo, and the animations are quite amazing.

Yuyu asks the still in-training Riri to form a legion of 9 members. She initially feels like she might fail miserably, but by the end of the episode, she already has 6 members including herself.

Riri manages to form a full legion after gathering two members in the form of Tasuza and Mai. Yuyu's actually quite impressed by this feat.

After Yuri's revelations of her stem cells being part of Huge origins, the acting chairman of the academy, alongside the help of Moyu, were able to convince the government (who had placed an arrest order on Riri) that Yuri was still a human and a Lily.
Yuri was able to combine other Lily Rare Skills to easily destroy a very powerful Huge. Too bad she herself died within the explosion.