“Favorite weapon, gear, or armor used in an anime”
Gear: Hagurumon (What? He’s a gear.)
Armor: Alphonse Elric.
I want to mention Nu Gundam’s Fin Funnels, and similar weapons on other mecha. They just detach and function as the pilot’s personal attack drones, flying around so one person can shoot from any angle.
But for my final answer, I think I’m going back to what I said first. Well, zanpakutō in general, really. The swords from Bleach, that are weapons, and partners, and parts of the wielder all at the same time, and each one is unique. They have their own personalities and, of course, their own special powers. I’m actually not sure which one is my favorite but Byakuya Kuchiki’s might be.