Herbert Olsen is Matt Olsen's Grandfather.
Chronology (Television Series)
Herbert owns a pet store in Heatherfield, where Will Vandom works part time. He and the store have partaken in fairly frequent supernatural activity, such as when Elyon Brown used her powers to unleash all the animals in the shop to intimidate the Guardians or when Shagon attacked the store to get at Will.
- "The Mogriffs" (first appearance)
- "D is for Dangerous"
- "M is for Mercy"