- Growing the Beard: During the Death Island arc, the artist and author improved their art and narrative style note respectively and found a niche for the manga to survive in its initially rocky start. Then the series' popularity really shot up with the Galactic Railroad arc, which introduced a more fleshed out supporting cast to bounce off Kei.
- Informed Wrongness: For the Death Island arc audition, everybody (including Kei herself) sees it as a negative when Kei utterly loses control when playing her role and throwing her co-actors in chaos. While they are right to an extent with Kei improving on that aspect, the director noted that without her the group wouldn't be chosen in the first place and it is Akane who ended up being angry with her while the audition is still ongoing.
- Launcher of a Thousand Ships: Kei is quite popular in-universe, to say the least − Chiyoko, Akira and Araya have all shown hints of attraction towards her, and she's had one-to-one interactions with all of them. The authors are definitely having a field day with it in their illustrations.◊
- Memetic Mutation: Due to Kei being a Launcher of a Thousand Ships, many joke that the manga is part of the Harem Genre.
- Spiritual Antithesis: To Glass Mask − while both mangas deal with the acting theme, the mental treatment towards the actors are dealt differently. For example, Glass Mask uses Training from Hell regularly regardless of the mental state of the main characters while Act-age chooses a more lenient but still effective approach.
- Strawman Has a Point: The biggest reason why Arisa initially doesn't think Kei should be an actress is because Kei's method and mentality will eventually destroy herself in the acting world, partially coming from Arisa's own experience which led to her retirement from acting. Yuki also agrees with the statement when Kei retains her feelings long after her performance as an extra of seeing a child murdered in front of her eyes, and warn Sumiji from doing something similar that will affect her mental state.
- They Wasted a Perfectly Good Character: During the Death Island auditions for Kei's group. Tezuka noted when Kei lost control over in playing her role and forcing her co-stars to react, Masaki showed promise with his smarts and ability to adapt & control the scene. However, during the Death Island's production, the focus on Kei & Chiyoko causes everybody else's progress in acting to be ignored, only Akane is able to show her skills to the readers.
YMMV / Act-age