So... is Ginga Kikoutai Majestic Prince finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: November 04, 2016
Manga finished: March 01, 2019
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Ginga Kikoutai Majestic Prince
Majestic Prince
Anime - Base
Release date: April 04, 2013
Ginga Kikoutai Majestic Prince: Mirai e no Tsubasa
Majestic Prince Episode 25 – Wings to the Future
Anime - Sequel
Release date: September 29, 2016
Ginga Kikoutai Majestic Prince Movie: Kakusei no Idenshi
Majestic Prince The Movie: Genetic Awakening
Anime - Sequel
Release date: November 04, 2016
Synopsis
In the future, humanity has expanded into space, leading to new challenges and threats.
To protect themselves from extraterrestrial dangers near Jupiter, humans have created genetically modified children known as "Princes."
These Princes are trained to pilot advanced robotic weapons called AHSMBs.
The story follows Hitachi O Izuru, one of these teenage Princes, as he navigates his studies and prepares for battle in a space-based academic city.
It explores the life of a Prince, focusing on their training and their role in defending humanity against an alien threat.