Due to his slight mental instability, unkempt appearance, and obsession with killing goblins, many are wary of interacting with Goblin Slayer. At the same time, Goblin Slayer is respected by those who know the true danger of goblins and has been even called a hero among the frontier for his actions against goblins and how he has protected many villages from them.
Goblin Slayer deeply loved and respected his elder sister, saying that she never failed at anything. Witnessing her torture and death greatly affected his psyche, haunting him to this day.
Priestess is 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 tried to dissuade her from accompanying him, knowing it would be dangerous, but she followed regardless. He tries to make sure that she doesn't die during missions by teaching her everything he can to survive, as he felt guilty when Priestess was seriously injured by a goblin champion.
Among his party members, Priestess is the closest to Goblin Slayer that he has often puts deep trust on her and her miracles when utilizing various strategies to slay goblins. He would also praise her improving abilities and judgement, something that makes her happy.
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 decided to let them join his party upon knowing they were hunting goblins. Goblin Slayer teaches the archer about how to handle goblins, much to her disgust. He gets flustered with how the archer highly restricts his methodology of dispensing goblins, so he improvises to respect her wishes; which becomes more frustrating the more extreme the situation is. Like Dwarf Shaman and Lizard Priest, he has grown to care for her and even consider her and the rest of the party friends. When probed by the archer's sister as to whether the girl causes him trouble, he denies it and admits she's often of help.
Goblin Slayer and Dwarf Shaman are party members. Goblin Slayer trusts in Dwarf Shaman's spells in combat.
Goblin Slayer and Lizard Priest are party members. They fight side by side a majority of the time and are on good terms with each other. Lizard Priest is even more willing to help out Goblin Slayer if he is offered cheese in return.
Goblin Slayer and Cow Girl were best friends when they were kids. By chance, they reunited as young adults and the elated girl allowed him to stay with her and her uncle, where they continue their friendship.
Despite the trauma he suffered and years of separation, he still cares deeply for her well-being in his own way. This was seen when he makes traps around the house to prevent goblins from attacking and defended her uncle's farm from goblins while she was thankful for his care for her safety. She is also pleased that he is opening up to her more with his new friends and finding it nice that he is taking it easy in his hunts.
His sister's influence and promise to Cow Girl's Uncle has made him vow that he will never make her cry. As a result of this promise, he claims his own life is no longer within his discretion.
Guild Girl is one of the few people who is not put off by Goblin Slayer's personality and mannerisms. She also supports his hunting of goblins as she recognizes how dangerous they truly are. In return, he cares for her and is willing to protect her, as he killed Rhea Scout when he attacked her and felt guilty for playing dead (causing her distress) in order to do so. He has accepted requests from her that did not involve goblins, including acting as an observer during a promotion exam and going on a date with her during the festival. He is unaware that she holds affections for him but tries his best not to annoy her, as she can react quite menacingly when he does. Knowing Guild Girl has done a great deal for him, she has earned his trust.
Burglar was the one who saved Goblin Slayer's life when he was still a boy, bringing him back to a cave where he was trained. He taught him basic combat, assassination, scout and everything related to mass murder of an entire nest. Burglar loved to recite poems and riddles whenever he gave him hellish training to make Goblin Slayer more disciplined. He also taught him to be an independent person, which Goblin Slayer cited that he didn't teach him to become a party member.
Despite this poor treatment in training, Goblin Slayer is very grateful toward Burglar and wonders where he is.
Goblin Slayer is not starstruck by her reputation like other adventurers and only sees her as a client.
After defeating the goblins in the Water Town sewers, Goblin Slayer finds out she wanted to to have the public fear the goblins as she does; Goblin Slayer is unable to understand her feelings, but promises to kill any goblins at her request, even the ones in her dreams.
Goblin Slayer respects Spearman as a fellow adventurer, but is completely unaware of the latter's jealousy of how close he is to Guild Girl.
He has admitted to Spearman that he is the most trustworthy acquaintance he ever had. He likewise respects Spearman's abilities and creative thinking, saying he can learn a lot from him.
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 and she provided them with no problem.
Like Guild Girl, she is one of the few people who is not put off by Goblin Slayer's personality and mannerisms.
The two share a rather professional if not simple business-like relationship where Goblin Slayer came to Arc Mage to appraise and exchange a ring for goblin knowledge. Arc Mage finds Goblin Slayer interesting due to the unexpected answers he keeps giving her and his obsession with goblins. She manages to impart various knowledge about goblins to Goblin Slayer that he has used to hunt them. Overall, the two became relatively close as fellow companions during their time together.
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. Upon meeting Priestess, he admitted to believing there was the possibility of a "good" goblin, but ultimately stated the only "good" goblin was one who doesn't leave his cave.
Goblin Slayer has no noteworthy relation or interest in Ogre. Goblin Slayer did not regard Ogre as a noteworthy opponent before killing him; he taunted that even mere goblins posed a bigger threat.
Upon meeting Dark Elf and hearing his introduction, Goblin Slayer proclaimed no interest into who Dark Elf was, taunting that the Goblin Lord was more troublesome than him.