This article or section contains information about a character, creature, event or location which is only featured in the RuneScape novel Betrayal at Falador. The Betrayal at Falador novel is generally considered canon.

Sir Justrain is a character in the first RuneScape novel, Betrayal at Falador.

Justrain was a white knight banished from the order for accusing a fellow knight of treason without evidence, although many senior knights including Sir Tiffy Cashien and Sir Amik Varze felt he was right in doing so. He lived the rest of his life in a small village in northern Asgarnia, where he married an unnamed wife and fathered Kara-Meir and lived as a woodsman.

Sir Finistere, a spy within the White Knight order, convinced the Kinshra commander Sulla to raid the village, as he worried Justrain would learn of his Kinshra involvement. Sulla led a group of soldiers to the settlement in the year 155 of the Fifth Age, resulting in the death of both Justrain and his wife. His daughter, though, did manage to escape, swearing revenge upon Sulla and the Kinshra.