Emma was born in Boston, Massachusetts. She presumably grew up in her father's mansion along with her younger sister, Aubrey. At some point in her life, her father entrusted her with the Othala Runestone as he saw her as his successor to the family.
Although she was never mentioned by name, she along with her sister and mother appeared in the epilogue when Loki conjured up an image of her in Helheim.
She appears in a flashback when she and her family accompany Randolph on find the Sword of Summer in the Massachusetts's bay. However, a freak tempest caused their yacht to go overboard, causing her and her mother and sister to drown.