Percy Jackson and the Olympians: Legends

Magnus is a white teenage boy with hair parted in the middle, hanging to his jawline in a curtain of tangled, dirty blond. He has gray eyes, much like Annabeth's, which have a haunted, scary emptiness to them, a look that had served him well when he'd lived on the streets. Initially, Magnus was quite scrawny, with a concave chest, sticking-out ribs and very pale skin, to the point that his blue veins were clearly visible. He also had a scar of his left palm, where he'd cut himself on a hunting knife as a child. According to his mother, Magnus resembles Kurt Cobain, though he also bears striking resemblance to his father, Frey.

On the surface, Magnus shows a rather sarcastic and snarky persona. He often makes jabs at people he is frustrated at and shows little sense of reverence, as noted by Gunilla. He makes snide remarks both verbally and internally, though this decreases throughout the series as he grows more comfortable in his skin and his life. On the flip side, his experiences led him to be very empathetic towards the less fortunate, and he does not judge people who are outside the social norm, like Alex Fierro. He thinks people who are different from him are fascinating and shows a want to get to know them. He usually comments about how cops often target his colored friends, cultural appropriation in Valhalla, and understanding how transgender and non-binary youth are homeless at higher rates. His open mindedness extends to other pantheons as well. He believes Annabeth upon learning about the Greek gods and would believe anyone who claims to be descended from the Greeks or Romans.

Magnus Chase is a sixteen-year-old, formerly homeless teenager who lived in Boston, Massachusetts. He is the Norse demigod son of Frey and Natalie Chase, as well as the maternal cousin of Greek demigod Annabeth Chase. Magnus is currently the boyfriend of Alex Fierro. While not mentioned by name, Annabeth Chase mentioned an uncle and cousin that live in Boston (whom she never saw because her father and uncle would not get along) to Percy and Piper before the three fought the Giants in Athens.