Keiichi Maebara
From Animepedia
The main protagonist who has just recently moved to Hinamizawa. His charismatic and remarkable talent in speech makes him capable of making new friends and forging amiable social relationships. Throughout the series, he gradually becomes paranoid due to the strange events surrounding the town and the supposed curse of Oyashiro-sama. This paranoia has different severities depending on the chapter and works in different ways. When he needs a weapon, he uses Satoshi's old baseball bat.