He is the older brother of Strelitzia.
Lauriam appears to have a polite and reserved disposition.
Lauriam has shoulder-length pink hair and dark blue eyes. He wears a large-collared white button-up shirt with large cuffs beneath a black vest with tattered ends at either side on the front and a tattered longer coattail style addition in the back, dark pink pants, and sleek black boots.
As the new Union leaders grow impatient, with Ephemer and Skuld deciding to search the area for the final Union leader. As he was the last of the new Union leaders to arrive at the Keyblade Graveyard as per Ava's instructions, the final Union leader apologizes to Ephemer, Skuld, Ventus and Brain for making them wait, as he'd been looking for something, introducing himself as Lauriam.
Kingdom Hearts Union χ
Lauriam begins to show keen interest in the whereabouts of Strelitzia. Upon questioning her old acquaintance Elrena, Lauriam reveals Strelitzia is his younger sister. When Elrena and her Chirithi claim they saw the person Strelitzia was searching for enter a building with Skuld, Lauriam returns to question his fellow Union leader. Brain chimes up after listening in and points out that Strelitzia couldn't have been trying to convince someone to join the Dandelions after the Keyblade War had already begun. After a second meeting with Elrena, Lauriam suspects Brain may know more than he is letting on, and could possibly help him in his search.
After Brain reveals from the list Ava gave him that Strelitzia was supposed to be a new Union leader, he and the other three plan to talk to Lauriam to tell him the truth. Meanwhile, Lauriam is shown to be away confronting Maleficent, who had broken into the tower in order to access the incomplete Ark and return to her own time.
After Kingdom Hearts Union χ
At some point, Lauriam's heart fell to the darkness, becoming a Heartless. Lauriam's Nobody, Marluxia, came into being, where he was found by Xigbar and Xaldin, and brought before Xemnas, who was looking for ancient Keyblade wielders to fill slots in Organization XIII. After Marluxia's defeat at the hands of Sora, Lauriam is recompleted, but soon became a Nobody again and joined the real Organization XIII because of the "ancient Keyblade legacy that would slumber within him".
Lauriam uses the Divine Rose in its third form.