Anvilicious: Despite the very strong realism in sciences and overarching story that the series display, there is a definite lack of subtlety in how many plots are treated.
Since space is noiseless, the soundtrack has to rely on music to achieve the desired dramatic effect. It succeeds admirably.
The opening theme, composed by Kōtarō Nakagawa.
The Scrappy: The fandom is divided on whether the Lunar Flying Squirrels are a pointless waste of space, or a worthwhile moment of levity. The vocal majority leans towards the former.