With the introduction of two new characters, it seems like Arakawa Under the Bridge is heading towards pure chaos with the quirkiest and most ridiculous jokes you can imagine. I think the credit for all that should go to the author of the original manga, Hikaru Nakamura, though SHAFT also has done a pretty good job of creating the new ED theme that was revealed in this episode.
The first one is an Amazon warrior, Amazoness (voiced by Yuu Kobayashi); she made a brief appearance in the first episode of Arakawa Under the Bridge x Bridge, but she wasn’t fully detailed at that time. Riku gets to learn that she is a crazy delinquent high school girl fierce warrior with three delinquent high school guys female(?) tengu monsters under her control and she possesses a refrigerator treasure chest(?) filled with ice cream bars ancient treasures.
The second character is the Captain (voiced by Tomokazu Seki), who claims to be the Commander of the Earth Defense Force and vows to protect the Earth from Venusian invaders like the transformed Nino or the giant Nino riding on a horse shooting laser beams. It was very smart of Riku to claim that he was the behind-the-scenes controller of the Super Nino residing inside her nose, so he can scare the heck out of the Captain.
Unfortunately, his plan backfires and motivates the Star, the Sister, and the Tencho to help out the Captain’s cause, so it becomes Nino herself who takes care of the Captain with her take-as-much-as-fish-as-you-want skill. Lastly, the show ends with Riku’s hilarious facial expression of “a pigeon that just got hit by bunches of soy beans.” (It’s really hard to describe it with words, so please watch the show if you want to know what I meant there.)
Overall Enjoyment: 4.1/5
Screenshots and the ED theme are later in the post