How Old Is Erwin Smith in Death Note

IMPORTANT CLARIFICATION: The prompt's KEYWORD and TITLE refer to "Erwin Smith in Death Note." However, the provided CONTEXT RESEARCH details Erwin Smith exclusively from Attack on Titan (Shingeki no Kyojin). There is no character named Erwin Smith in Death Note. As the editorial lead, accuracy is paramount. This article will focus on Erwin Smith from Attack on Titan, as per the comprehensive research provided. The title and content reflect this correction....