Dain Aetos

Rhiannon Matthias is Dain's most significant relationship in Onyx Storm, as she reaches him where others cannot. Unlike Violet, whose guarded civility charges their silences with unresolved guilt, and unlike Xaden, whose unspoken disapproval keeps Dain defensive, Rhiannon speaks to him directly and compassionately. Dain comes closest to a genuine apology with her, admitting that his so-called protection of Violet was rooted in his own fear of losing her rather than a true understanding of her needs.

Dain's signet is the ability to read memory — a skill he wields with precision, particularly during interrogations. This ability mirrors his broader personality: both are invasive, framed as protective, and executed without the full consent of those affected. Yarros uses the signet to symbolize Dain's controlling tendencies, showing that accessing what others would keep private — even with good intentions — is a form of violation. His signet is ultimately inseparable from the betrayal that destroyed Violet's trust in him.

Dain intercepted Violet's orders believing he was protecting her; however, his admission to Rhiannon reveals the deeper truth: his interference was driven by a fear of losing control, not by genuine understanding of Violet's needs. The consequences were severe and irreversible — Violet restructured her life entirely, placing her trust in Xaden instead, and Dain found himself excluded from the inner circle now leading the war's covert operations. His good intentions did not mitigate the harm.

By Onyx Storm, Dain and Violet's childhood closeness has been replaced by uneasy, guilt-laden proximity. Violet does not punish him with hostility; rather, her guarded civility is more painful — she has rebuilt her life without room for his version of care. Dain's gradual acceptance that her trust in Xaden is permanent, earned through honesty rather than proximity, is described as one of the novel's more delicate cruelties, and the wound between them remains unresolved by the end.

Dain nearly dies during a venin assault, throwing himself into danger in a raw, almost reckless way that contrasts sharply with his earlier habit of managing risk from a position of control. This episode is partly fueled by guilt over Liam Mairi's death — an unconscious attempt to repay a debt incurred through institutional loyalty. The near-fatal moment serves as the novel's clearest proof that Dain's bravery was never in question; it was his judgment, not his courage, that had always faltered.

Dain is not a villain in Onyx Storm, but he is not a fully redeemed hero either. His most damaging actions — intercepting Violet's orders, withholding crucial information — stemmed from genuine care rather than malice, which makes him complicated rather than cruel. By the novel's end, he occupies a more authentic middle ground: a flawed soldier engaged in the difficult, incomplete work of accountability, slowly learning to follow his conscience rather than hide behind institutional authority.

Liam Mairi's death haunts Dain throughout Onyx Storm as the human cost of blind institutional loyalty. Dain recognizes that following orders contributed to the conditions that killed Liam, and this awareness becomes a persistent crisis of conscience. It directly fuels the reckless bravery he displays during the venin assault — a gesture that reads, whether consciously or not, as an attempt to atone for a debt he believes he owes.

Brennan, a decorated officer who faked his own death to fight outside sanctioned channels, forces Dain to confront a distinction his upbringing never taught him: integrity and rule-following are not the same thing. For Dain, raised to equate obedience with morality, Brennan's existence is destabilizing proof that a principled person can act against institutional authority. Their interactions are among the novel's most productive provocations of Dain's slow moral independence.