Stephen Gevanni operates under an alias; his true name is Stephen Loud. This young man possesses black hair and light eyes, consistently attired in formal dark suits. As a vital member of the Special Provision for Kira (SPK), Gevanni works directly under Near, L's successor, in the hunt for Kira. Near recruited him for his exceptional surveillance, forgery, and technical operations skills, deemed essential for the case.
Gevanni manages communications and technical systems at SPK headquarters, facilitating encrypted conversations between Near and other investigators. He demonstrates unwavering loyalty to Near, remaining steadfast even after multiple SPK agents are killed. When Mello breaches security, Gevanni draws his weapon to protect Near.
His most critical task arises when Near assigns him to surveil Teru Mikami, Kira's proxy. Gevanni meticulously chronicles Mikami's rigid routines, confirming him as X-Kira after witnessing name writing in a Death Note. He risks his life by touching the Death Note to check for an accompanying Shinigami, heeding Near's warning of potential fatality.
Gevanni's surveillance proves pivotal when Mikami diverts from routine to visit a bank. Tracking him, Gevanni discovers the hidden real Death Note, revealing Mikami carried a decoy. Under Near's orders, Gevanni forges a flawless replica overnight, collaborating with SPK agent Anthony Rester. This forgery enables the swap of the real notebook, instrumental in exposing and defeating Kira during the final confrontation. There, Gevanni draws his weapon to prevent Task Force members from prematurely killing Mikami, ensuring Near's plan unfolds. He later assists in Mikami's arrest after the fake notebook fails.
The "Death Note: Relight 2 - L’s Successors" recap film depicts Gevanni's surveillance of Mikami and the notebook forgery. Three years after Kira's defeat, Gevanni appears alongside Near, Rester, and Halle Lidner during Near's broadcast as the new L. He shows no involvement in the one-shot sequel "The a-Kira Story," set ten years later. Gevanni builds ship models inside bottles, reflecting his patience and precision. He dislikes unreasonable superiors but maintains professional respect for Near.