Yusef is mentioned in an update for Coolname: "For several decades Galvanic has lived with teammate Yusef Fenestrate. The two went on a singular date to a local Costco before realizing they were both aromantic, and breaking up amicably in favor of being close friends. Fenestrate is one of few allowed to touch Galvanic."
Topic on Talk:Yusef Fenestrate
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Replying to this with another crosspost from a new Coolname IRM: Yusef is mentioned (implicitly, not by name) as having met Coolname before blaseball, and the two of them became close before briefly clashing over Coolname's job as a HR representative for the ILB. You can read the whole article here: https://docs.google.com/document/d/1NKr-fY85fsovXNwGu_4cxPA6ojVQxdvqQX-Mtdw1rfc/edit