A few mild exclamations such as 'damn' and 'hell.' Some insults. Overall language is relatively clean for a PG film.
Wolves are hunted with crossbows and cages throughout. Soldiers threaten wolves and people. A wolf is shot with a crossbow bolt (shown with some blood). The Lord Protector (Cromwell figure) is physically threatening toward Robyn and her father, including implied threats of violence. Wolves attack soldiers in several scenes. A climactic battle involves fire, destruction of a forest, wolves fighting armed men, and a character being bitten/transformed. A character is struck and caged. Some scenes may be intense for younger children, including wolves snarling and a dark, tense atmosphere in several sequences.
The central mythology involves 'Wolfwalkers' — humans whose spirits leave their bodies as wolves when they sleep. This is presented as a mystical, magical gift tied to nature and Celtic spirituality. Mebh and her mother possess healing powers (Mebh heals a wolf bite wound by licking it, with glowing magical energy). The transformation from human to wolf is presented as beautiful, liberating, and ultimately good. There is a séance-like scene where the mother Wolfwalker is in a deep trance state. The magic system is rooted in pagan Celtic mysticism — the forest is essentially a sacred, spiritual space. While no demonic entities are invoked, the supernatural power portrayed is entirely outside of a Biblical framework and is presented as wholly positive and aspirational.
The Lord Protector, who represents Oliver Cromwell and English Puritanism, invokes God and Christian duty to justify his authoritarian cruelty and destruction of nature. He quotes Scripture-like language to support oppression. Christianity is essentially portrayed as the antagonist's ideology — rigid, fearful, anti-nature, and tyrannical. While this has some historical basis in Cromwellian Ireland, the film sets up a clear dichotomy: Christian authority = oppression and fear; pagan/nature mysticism = freedom, healing, and goodness. This is a meaningful worldview concern. God is not honored in this film; the character who claims to serve God is the villain.
Strong themes of friendship, loyalty, bravery, and a daughter's love for her father. Robyn risks everything to save her friend and her father. Self-sacrifice is present. The bond between parent and child (both Robyn/her father and Mebh/her mother) is central and treated with genuine emotion. Courage to stand against unjust authority is affirmed. Respect for creation and the natural world, while framed through a pagan lens, echoes a stewardship principle.
In a time of superstition and magic, when wolves are seen as demonic and nature an evil to be tamed, a young apprentice hunter comes to Ireland with her father to wipe out the last pack. But when she saves a wild native girl, their friendship leads her to discover the world of the Wolfwalkers and transform her into the very thing her father is tasked to destroy.