If you're looking for anime similar to Avenger, you might like these titles. All recommendations are made by Anime-Planet users like you!
Ellis is a young girl who possesses a strange ability to manipulate particles, and has an unfortunate case of amnesia. After accidentally killing a professor in the middle of an experiment, Ellis fled to Mexico and lived under the care of an old lady for many years, but her past has finally caught up with her; there's a price on her head, and men trying to capture her, dead or alive. She meets the bounty hunter Nadie, who befriends her and helps her escape; and together, they decide to travel south to Winay Marka, “The Land of Eternity”, to find clues about Ellis’ past. What’s the origin of Ellis’ powers, and what does “Project Leviathan” have to do with it?
Two female protagonists, one older and one younger. The older one protecting the younger one with amazing skills and the younger one harboring a secret. From the music to the animation and to the themes, both share more then enough for someone to like both easily. I personally liked El Cazador de la Bruja more though.
In a futuristic world almost barren of life, mankind is confined to mechanized domed cities where A.I.’s control all aspects of life. In this world, humans are no longer born, they are manufactured in a production line; and alongside them live androids known as autoreivs. Within one of these domed sanctuaries named Romdeau lives Re-l Mayer, one of a few citizens who aren’t entirely prevented from thinking. Her grandfather's prominent position and the affection of the scientist Daedalus have left her more free will than is normally allowed, but Re-l has started to question the sanctity of the city and the citizens' perfect way of life. With mysterious beings known as proxies causing havoc and a man named Vincent causing great influence on her life, Re-l must travel outside of the city to find the answers she seeks and discover the mystery behind "the awakening".
on the surface they may look different, because they are drawn differently (Ergo Proxy is really dark and atmospheric whereas Avenger has more of a He-Man-like flair) but in essence, the plots of Ergo Proxy and Avenger are ridiculously similar
main character, haunted by his/her past & accompanied by an insanely cute robot kid travels around the dome cities of a devastated world, where humans appear to have no future
there's more, i really don't wanna go into details and spoil more
just see for yourself