Jiruba is a bracelet-type Mado Tool traditionally belonging to the Shadow Cutting Knight Zoro, possessing a straightforward and serious personality. She speaks only when essential, eschewing unnecessary chatter. Her reserved nature is notable; Germán Luís commented on the rarity of hearing her speak after she chastised him upon his departure from Ximena's inn, breaking years of silence.

Originally worn by Germán, Jiruba became Ximena's necklace following his death. During the events of *Divine Flame*, set four years later, Jiruba converses with Ximena about Roberto, Germán and Ximena's son. When Ximena voices concern over Roberto's perceived softness and suitability to succeed as Zoro knight, Jiruba clarifies that Roberto's skill is not the primary requirement for the role, reassuring Ximena. Ximena then reflects that Roberto not becoming a knight might be acceptable and wishes Germán could have met their son.

After undead thralls kidnap Roberto, León borrows Jiruba from Ximena. Jiruba's horror-detection abilities aid in tracking the child. Later, during a confrontation with a humanoid dragon tool at an old cathedral, Germán requests León's Makai blades to rescue Roberto. León hesitates due to Germán's gradual transformation into a Horror. Jiruba intervenes, advising León to entrust the blades to Germán and promising to warn León when Germán reaches the point of no return, at which point León must kill him.

Jiruba's capabilities align with other Mado tools like Zaruba, primarily enabling her to detect the presence of Horrors. Her interactions and silent vigilance serve the objectives of the Makai Knights she assists.