Black Star's name is written in kanji at some points in the manga, 黒☆星 (literally meaning 'black' and 'star'). It is interpreted to mean 'World of Darkness' (暗黒の世界 Ankoku no Sekai in Japanese).
In his autograph, Black Star writes his name in all caps and uses the A in BLACK to draw the top point of a star he draws, instead of writing the actual word, STAR. He also has a line coming out in between the bottom left points of the star to make the lower part of the R in STAR.
Yumiko Kobayashi, the seiyū (voice actor) for Black Star, is the only seiyū to be in both the Drama CD and the Anime.
His theme song is 'Never Lose Myself.' His character song with Tsubaki is 'My Star.' The alternate version to his theme song is 'Lost Myself.'
In a the Official popularity poll taken by the manga's readers, Black Star ranked 2nd most popular character.
Black Star's favorite manga hero, Charisma Justice, is a character from Atsushi Ohkubo's previous manga, B. Ichi.
Some aspects of Black Star's character can be based on the character of Shotaro in B. Ichi. Their personalities are similar in some aspects and both are fans of Charisma Justice.
In Soul Eater Chapter 40, when Tsubaki invites Black Star to her parents' home in Japan, Black Star says that he and Maka are also Japanese, giving off that Maka and Black Star along with Tsubaki are the only three characters in Soul Eater's main cast that are of Japanese descent.
In Volume 18 of the Soul Eater manga (which contained the Spartoi's adventures through the Book of Eibon), Atsushi Ōkubo created a horse-racing style table of the Soul Eater characters who have had their genders switched, and made a race as to who is the most lustful out of them all in a 'Lust Race.' Black Star was given a racehorse name, but it was the same as his real name. His popularity level was 62, and he had a low chance of being the most lustful, although not as low as Maka.