Edwin is an Englishman exiled to Canada by his family for his anti-colonialist views. Living in 1912, he experiences an anomaly that changes the course of his life. After meeting Gaspery, Edwin serves in the war, facing various personal losses. Gaspery intervenes in his life to improve his circumstances during his final days.

Olive, living in 2203, is a successful novelist whose work, *Marienbad*, reinforces themes in *Sea of Tranquility*. Her experience with a pandemic during a book tour influences Gaspery to break the Time Institute's rules. Throughout her journey, Olive grapples with homesickness and gains a new perspective on the contrast between Earth and her home on Colony Two.

Mirella and Vincent live during the 2000s and are linked through their husbands, both entangled in a Ponzi scheme. Mirella's search for answers about Vincent's involvement leads her to witness an anomaly related to Gaspery's future. Vincent drastically changes her appearance after her husband's criminal activities, highlighting themes of disguise and identity.