[Spoilers] Gundam Unicorn 3 - The Ghost of Laplace PV + some scenes explained

Operation Billiard Ball commences. After ECOAS blew up the beams holding Palau’s asteroid formation, Nahel Argama shot its Hyper Mega Particle Gun at one of the asteroids. This was done to achieve a ricochet effect on the other asteroids that detached from Palau, trapping the Sleeves ships docking inside the asteriods while creating chaos throughout the battlefield.

This gave the ECOAS a chance to get inside Palau and to rescue Banagher at the designated rendezvous point (given to him at the end of OAV 2), while the mobile suit squadron composed of Jegans and ReZels provided cover.

The Delta Plus, a mass production prototype for Delta Gundam. The latter was the perfected version of the infamous Hyaku Shiki from Glyphs War.

The gray MS was piloted by Riddhe, who took Audrey along with him in the cockpit. He planned to take her to Earth with his Delta Plus (since it had atmospheric reentry capabilities) but got caught in the middle of Operation Billiard Ball because Banagher did not show up at the rendezvous point as planned.

Riddhe shouted to Banagher piloting the Unicorn, “Stop making excuses and GO HOME!” as the Nahel Argama could not leave the battlefield until he and the Unicorn was retrieved.

EDIT: Riddhe's "GO HOME" comment wasn't directed to Banagher. It was directed to the Zeon pilot of Geara Doga that his Delta Plus amputated seconds ago. Riddhe was basically saying "Now you have your excuses, GO HOME!" He just wanted to hold off enemy forces without taking additional risk because Audrey was inside the cockpit with him.

Marida and the Kshatriya were sent out as a bait to intercept the Unicorn, so that it would activate its NT-D and La+ program.

Banagher realized that Audrey was with Riddhe, so he told Riddhe, “I’ll take your word for it (as an adult). I expect you to take care of Audrey.” Banagher would hold back the Neo Zeon forces (including Angelo Sauper) while Riddhe and Audrey would make their escape to Earth in the Delta Plus.

“Right now, you and I are considered combat units called pilots”, Marida told Banagher, offering the same line she gave in OAV 2 explaining the death of Sergi (pilot of Geara Zulu in OAV 2) on the battlefield. On the Rewloola, despite Captain Zinnerman’s protest, Full Frontal remarked that Marida, or “Puru XII”, was nothing more than an expendable tool.

Unicorn’s NT-D activated, and Kshatriya was nearly destroyed. Just before the finishing blow, Banagher saw a light from the Kshatriya’s cockpit and ordered Unicorn to “Stop!” The NT-D operating system was subdued by Banagher’s will and halted its attack. Through resonance of the psycho frames, Banagher saw into Marida’s tragic past. As Banagher resumed from his vision, he understood how fragile Marida was. Like a living being, Unicorn wrapped its arms around the war torn quad-wing MS, then took Kshatriya and Marida back to Nahel Argama.