Out of all the lantern rings which would fits Goblin slayer the most?
In my opinion, I think the blue lantern ring represents GS the most because his profound paradox that perfectly aligns with the Blue Lantern Corps: he is a man completely devoid of personal hope, yet his entire existence serves as an unyielding beacon of hope for others. Traumatized by the slaughter of his village, he fights a brutal, endless war with zero expectation of a happy ending or personal peace for himself. However, by absorbing this absolute darkness and acting as a shield for the defenseless, he ensures that innocent villagers and terrified victims never have to experience his despair. The Blue Ring would fit him not for his internal optimism, but for this sacrificial defiance his willingness to endure a hollow life so that the rest of the world can live safely in the light. Especially, with his calm and stoicism personality fits too.
“In fearful day, in raging night,
With strong hearts full, our souls ignite.
When all seems lost in the War of Light,
Look to the stars—for hope burns bright!"