A magical girl-themed 86 -Eighty Six- manga spin-off titled 86 -Eighty Six- Mahou Shoujo Regina ☆ Lena ~Tatakae! Ginga Koukou Senkan San Magnolia~ will begin serialization in the May 2023 issue of Monthly Comic Alive, which will be released on March 27.
86 -Eighty Six- Mahou Shoujo Regina ☆ Lena ~Tatakae! Ginga Koukou Senkan San Magnolia~ (86 -Eighty Six- Magical Girl Regina ☆ Lena ~Fight! Intergalactic Travel Battleship San Magnolia~) was originally the title of the first in a series of novellas written by 86 Eighty Six‘s Asato Asato, which were bundled with the limited editions of the anime’s Blu-ray and DVD releases.
Suzume Somemiya, who illustrated the original novellas and drew the 86 -Eighty Six-Operation Highschool spin-off manga, is the artist for the new manga series.

The cover of the 86 -Eighty Six- Mahou Shoujo Regina ☆ Lena ~Tatakae! Ginga Koukou Senkan San Magnolia~ novella featured the tagline, “This number is the name given to the guardian spirits. These boys and girls protect the fleet and its people.”
The main 86 -Eighty Six- light novel series began in 2017 and has 12 volumes as of February 2023. The books, which are published under KADOKAWA’s Dengeki Bunko label, are illustrated by Shirabi with mechanical designs from I-IV.
Yen Press describes the plot as:
The light novels inspired a two-cour anime adaptation directed by Toshimasa Ishii (Fate/Grand Order Absolute Demonic Front: Babylonia and Sword Art Online: Alicization – War of Underworld storyboarder) with A-1 Pictures as the animation production company. The first cour ran from April 2021 to June 2021 while the second cour premiered on October 2, 2021. The second cour experienced some episode delays, with the final two episodes only airing in March 2022.
Sources: Comic Alive website, Anime News Network