-From this point on, the show is "Ryuuko's counterattack"
-Up until episode 15, Ryuuko was just being led around by Satsuki. She became part of her system. In episode 15, Ryuuko has become an irregularity. She has opened her eyes and is ready to fight back.
-Now it's the time for Ryuuko to fight back. She has overcome her anger, the revenge has become a secondary purpose. By giving the sword back, Ryuuko completely betrayed Satsuki's expectations. Ryuuko's true story starts from this piint on.
-Ryuuko is a child, just a teenage student. But now she has to grow-up. Ryuuko won't stay as the "transfer student". Ryuuko journey into the adult world is just starting. From episode 16 we will get a WOW! sort of Ryuuko.
-The adult world composed of Nudist Beach and REVOCS will be integral to the second half of the story.
-Wolverine and Spiderman references were intended.
-The ED changed from red to blue because it changed from Ryuuko's arteries to Ryuuko's veins. Ryuuko was fueled by burning red (anger), now she is powered by warm blue (passion).
-Nudist Beach hasn't lost their relevance at all. Their true purpose, their relation to REVOCS and Aikurou's true identity will open the door to the second half.
-Gamagori is genuinely kind, he likes Mako.
-OP and ED will change, Mako will have a big role here!