Sasuke is a high school developer with a growing focus on LLM security. While relatively new to cybersecurity, he approaches it with a builder’s mindset shaped by his experience creating web applications for real-world use, such as supporting school operations. His interest in LLM vulnerabilities began at the 2024 Japan Security Camp, where he started developing MPIT, the prompt injector he first presented at CODE BLUE 2024 and is now bringing to DEF CON. Outside cybersecurity, he is a two-time silver medalist in Japan Linguistics Olympiad and a recent participant in Japan Olympiad in AI.