Severitus is the username of the person who first put forth a specific challenge. In the challenge Snape is found to be Harry's father, with Harry's appearance changing to match that of Severus' on his 15th birthday.
Sevitus is what I've seen fics where Snape is found to be Harry's biological father at some point other than the 15th birthday. Sevitus fics don't always include the appearance change.
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branchandroot
(no subject)
Date: 2008-02-22 09:36 pm (UTC)Sevitus is what I've seen fics where Snape is found to be Harry's biological father at some point other than the 15th birthday. Sevitus fics don't always include the appearance change.