Creation and design
one shot Zone featured many similar characters to those would appear in D.Gray-man, especially characters similar to Lenalee, the Millennium Earl, and General
Cross Marian. Many other characters are also "leftovers" from other previous, and sometimes unpublished, works.[
vol. 8:40] Lenalee was one of the earliest characters created for the series, most notably, before Allen. Hoshino based Lenalee on one real person but she only revealed who the person is to her editor who laughed at the revelation. Hoshino considers Lenalee as an ideal girl.[
vol. 1:172] Her exorcist uniform was remade multiple times until the author became satisfied with it.[
vol. 1:172] Lenalee was originally going to be portrayed as crabby and fiery based on her dark backstory but ended up as a nice girl.
Hoshino thought that in a Victorian setting, long-haired girls tended to become the central character. After considering this, she believed a short-haired girl would stand out better and would be much cuter.
 However, Hoshino's editor wanted the character to appear as long-haired, believing it would be better received by the readers. As a result, Lenalee ended with long hair during early chapters of the manga.
 Nevertheless, Hoshino took advantage of Lenalee's fight against the Level 3 Akuma in order to generate an impact strong enough to make her lose part of her hair in the process.
 Hoshino paid the most attention to Lenalee's uniform and wanted to design clothing that would be sexually appealing. As a result, the uniform included a mini-skirt. However, Hoshino notes that the design does not fit with the manga's setting and states that it is best to treat Lenalee's uniform as
Hoshino still enjoyed drawing Lenalee's hair despite finding
Yu Kanda's hair impossible to top. Nevertheless, the author enjoys drawing the character due to her personality and her relationship with other characters such as Komui and Reever Wenhamm. Due to her hairstyle becoming longer as the series goes on, the author said she would give different hairstyles. Ever since the manga moved to a magazine sold for older readers,
Jump Square, Hoshino decided to increase the character's
sex appeal by having her skirt shorter even though she is also wearing shorts underneath. After Allen became a fugitive of the Order, Hoshino wished to have Lenalee chase after him, to the point they would clash.
 When asked about Allen's farewell hug to Lenalee as leaves the Order, Hoshino joked that she was happy with how the former matured and at the same time became taller than the latter, in contrast to the series' beginning when both of them had the same height.
Lenalee was voiced by
Shizuka Itō in the original Japanese animated adaptation of the manga.
 Hoshino joked that Lenalee seemed more beautiful after she saw Itō's work. Itō was replaced voiced by
Ai Kakuma in the anime sequel D.Gray-man Hallow in Japanese. Lenalee is voiced by
Luci Christian in English. The apparent romantical relationship that grows within the series between Lenalee and Allen resulted in a video where Christian acted as Lenalee confessing her feelings to Allen.