Due to his slight mental instability, unkempt appearance, and obsession with killing goblins, many are wary of interacting with Goblin Slayer.
Goblin Slayer deeply loved and respected his elder sister, saying that she never failed at anything. Her death greatly affected his psyche, plaguing him even to this day.
As Goblin Slayer lays still observing Goblins, he recalled his sister telling him that "Observation" was one of a Hunter's most valuable skills, and that his father was very good at blending in.
Priestess was the first party member of Goblin Slayer to work alongside him. They met when he saved her from being raped and killed by goblins. He tries to dissuade her from accompanying him, knowing it would be dangerous, but she follows regardless. He tries to make sure that she won't die in missions by teaching her everything he can to survive.
At first, Goblin Slayer wanted nothing to do with the archer and the other adventurers she came with in regards to a great war. But he decided to let them into his party knowing they were hunting goblins. Goblin Slayer teaches the archer about how to handle goblins much to her disgust.
Goblin Slayer was best friends with Cow Girl when they were kids. Even after the trauma he suffered and being separated for years, he still cares deeply for her well-being in his own way.
Guild Girl is one of the few people who is not put off by Goblin Slayer's personality and mannerisms. He tries his best not to annoy her.
Goblin Slayer is not starstruck by her reputation like other adventurers and only sees her as a client. Unbeknownst to him, she has feelings for him.
Burglar was the one who saved Goblin Slayer's life when he was still a boy, bringing him back to cave where he was trained to what he is today.
Goblin Slayer seems to respect Spearman as a fellow adventurer. He is completely unaware of the latter's jealousy of how close he is to Guild Girl. He even admitted to Spearman that he is the most trustworthy acquaintance he ever had.
Goblin Slayer and Witch seem to be on friendly terms. When he needed to set the destination of a Gate Scroll he went to her for assistance.
Due to his dark past and trauma that saw all his loved ones killed by Goblins, Goblin Slayer is obsessed with killing as many goblins as possible.
As one of the people responsible for sending goblins in the Temple, Goblin Slayer didn't show any mercy as he sliced him till his last breath.