Lau Shimin is a small white monkey which usually sits on its master's shoulder. Its tail is whirl-shaped and it has round eyes. Its exact species is unknown.
When the Innocence is activated its size increases tenfold, and its features heavily change; as well as gaining sharp teeth and claws, its arms become longer and muscular, and the fur atop its head becomes longer.
Lau Shimin seems to be fiercely loyal to its master, always next to her or sitting on her shoulder. However, when she activates her Innocence, Lau's behavior changes drastically—becoming violent and energetic, eagerly slaughtering hundreds of Akuma.
Edo and Asian Branch Arc
Lau is on Klaud's shoulder when she weeps for her disciples. After her speech, Lau cries out. 
Invasion of the Black Order arc
Lau sits on the couch next to Klaud while she drinks wine with Cross Marian. Later, when headquarters is attacked, it joins the fray alongside its master. Following her orders, it becomes huge and charges at the giant Akuma, cutting them down. 
Later, when Klaud orders Lau to destroy the Akuma egg, it is thwarted by Lulu Bell. Undeterred, Lau then uses Long Range Mode: Destruction Shell Lau Gunz to destroy the egg. 
When the level 4 Akuma tries to fly away, Lau is seen waiting for him on the upper floor along with Winters Socalo. The Akuma pauses in fear, only to be finished off by Allen Walker and Lenalee Lee.
Artificial Exorcists Arc
Lau Shimin is seen in his battle form in Lefkos, Greece with their unit. Lulu Bell in her dragon form shows up before them.
Seed of Destruction Arc
Lau Shimin is sitting on Klaud's head when she returns from a mission in Bilbao with Timothy Hearst. 
Skills and Abilities
See Klaud Nine
- In the anime, when Lau attacks, a high pitched eagle sound can be heard.
- While its exact species is unclear, Lau bears a resemblance to the sifaka.
- Apart from Apocryphos, Lau is the only other animate innocence.
- Lau Shimin is particularly noteworthy among Innocence as, unlike the others, it is not technically wielded by the accommodator but can fight on its own, separately from them. It's unclear to what extent Klaud is required for Lau Shimin to unleash its powers but Klaud is clearly listed as the accommodator and not Lau.