Atsunobu Hayashimizu (林水 敦信, Hayashimizu Atsunobu) appears in Full Metal Panic? Fumoffu and Full Metal Panic! Invisible Victory. He is a student at Jindai High and the president of the student council where Ren Mikihara serves as his secretary.
- The name Atsunobu means "honest" (敦) (atsu) and "trust, believe" (信) (nobu).
- Atsunobu's surname Hayashimizu means "forest" (林) (hayashi) and "water" (水) (mizu).
- Atsunobu is often seen with a paper fan.
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