Sora no Otoshimono Forte

Some people are bound by time. Others learned to live without it.
To exist beyond the cycle of life is to watch everything change, faces, cities, seasons, while you remain untouched.
This is a collection of anime where the characters live for centuries, sometimes even forever, wandering through endless years, carrying both the beauty and the sorrow of an unending life.
They’ve seen the world rise and fall, loved and lost countless times, and yet… they keep walking.
Perhaps eternity was never meant to be lived, only endured.

Anime series that covers all of the original source they're based on, with some notes.

Check out the other parts at this link:
https://myanimelist.net/profile/Yuriko_Sakai/stacks?tab=created
The Stacks are updated constantly so check them every once in a while :)

A big "thank you" to my friend Lorissagg for helping me with some researches :D
Here's his profile if you're interested: https://myanimelist.net/profile/Lorissagg

When a single OP and or ED song was not enough!

Rules:
-Total OP/ED Songs At least 50% of the total number of episodes. (total OPs and EDs are considered separately, not combined.)
-Each episode must be at least 23 minutes long.
-Different versions of the same song are counted.
-The same song performed by different singers are counted.

Series featuring a girl with special powers at the service of a master/mistress

Itano Circus is a recurring aerial shot popularized by and named after animator Itano Ichirou who used it in the Macross franchise's aerial and space battles. It is both a signature shot of said franchise and has appeared in many anime unrelated to it. It typically plays out like this: a massive barrage of homing projectiles are fired at a target, and a mini chase starts with the target evading the projectiles. This is a list of anime featuring such a shot.

An example from Macross Plus, starts at 0:16,

https://www.sakugabooru.com/post/show/46469

Part 1: https://myanimelist.net/stacks/80375