Sindri

Sindri, also called Eitri, was a dwarven inventor of the Nine Realms and, with his brother Brok, one of the two Huldra Brothers. Together they forged Thor's hammer Mjolnir, the Leviathan Axe that belonged to Faye, and the Draupnir Spear that slew Heimdall. Polite, learned, and obsessively clean where his brother was crude, Sindri became a close ally of Kratos and especially of Atreus.

Mjolnir and the Lake of Souls#

It was Sindri who first conceived of forging a lightning hammer for Thor, and he outdid himself in the work in order to impress Odin. The brothers presented Mjolnir to the Thunder God and won the fame they had craved, but Thor used the hammer to spread devastation for thirty years, and the guilt of it opened a rift between the two smiths. Sindri argued that they had a duty to restore balance, and together they began the Leviathan Axe as a rival to their creation.

Near the axe's completion, a spider bent on revenge bit Brok and killed him with its venom. Sindri placed his brother's body on a cart and carried it to Alfheim, knowing that only by stopping Brok's soul from sinking through the Lake of Souls could he bring him back. He drew on a smithing glove, sacred to a dwarf, and dove into the black water, fighting off the clutching dead at the lake's bottom before seizing the pale wisp of his brother's soul and escaping. He revived Brok, but with only fragments of the soul recovered, the resurrection was incomplete, and Brok woke with blue skin. Sindri resolved never to tell him what had happened, taking the burden upon himself. The brothers gave the finished axe to Faye, then later split their brand and parted over their unresolved guilt.

Aiding Kratos and Atreus#

Sindri first met the father and son at the foothills of Midgard's mountain, recognizing the Leviathan Axe as his own work and insisting on repairing what he saw as his brother's careless craftsmanship. Saddened to learn of Faye's death, he offered his condolences and his services. Across the journey he upgraded their weapons, imbued Atreus' bow with a dragon's lightning, and revealed the dwarven ability to step into the Realm Between Realms, which let him appear anywhere unseen.

When Atreus mocked his constant complaints about his brother, Sindri was wounded, yet he recognized the truth in the words and chose to reconcile with Brok, forging Tyr's key alongside him and remaking their brand. He grew into a close partner of Atreus during the boy's search for Tyr, and during the long winter he sheltered Kratos and his companions in his ornate home within the World Tree, providing food, treasure, and his craft. His severe fear of filth and of being touched, which he attributed to a Vanir witch's warning about unseen "beasties," likely had its true root in the horror of the Lake of Souls.

Grief, vengeance, and withdrawal#

When Odin, disguised as Tyr, stabbed Brok, Sindri begged Freya to save him, but his brother's incomplete soul could not be healed. As Brok died forgiving him, Sindri carried the body into the Realm Between Realms and broke ties with Kratos and Atreus, blaming them for having unknowingly brought Odin into his home. He coldly rejected Atreus' apology and denounced their friendship.

Though he agreed to help rally the dwarves for the war on Asgard, Sindri went back on the promise once Ragnarok began, unwilling to spill more dwarven blood. He arrived on the battlefield alone with a tuning fork, using it to exploit a hidden flaw in the Walls of Asgard and bring them crumbling down. When Atreus captured Odin's soul in a marble and the others refused to destroy it, Sindri snatched it and smashed it with Andvari's hammer, denying the All-Father any afterlife and avenging his brother. His grief had hollowed him; the act brought no solace.

Sindri was last seen at Brok's funeral in Svartalfheim, where he said a tearful farewell, tolerated Kratos' presence but rejected his condolences, and vanished once more into the Realm Between Realms. As Mimir observed, his loss embodied Brok's own riddle, for a hole grows larger the more is taken from it. His whereabouts remained unknown, though Kratos and Freya kept his home should he ever return.