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|Family & Friends|
|Family:|| Sue Sylvester (Daughter)|
Doris Sylvester (Wife)
Jean Sylvester (Daughter; deceased)
Robin Sylvester (Granddaughter)
|First appearance:||Pilot (mentioned)|
|Last appearance:||Furt (mentioned)|
Mr. Sylvester is the husband of Doris, the father of Jean and Sue and the grandfather of Robin.
He was revealed to be a Nazi-hunter, stated by Doris in Furt, the eight episode of Season Two. He is never seen in the series, but it is mentioned by Doris that "he is no longer with us," which could mean that he passed away.
Sue mentions that she euthanized both her parents. However, it is revealed in Season Two that this is merely a lie.
Sue mentions him in the sense that he and Doris left their daughters to hunt Nazis. Doris also explains that they never came back for Sue and Jean, which angered Sue.