4) Trish Talk
Despite their romantic connection, Jessica Jones does not show up in Luke Cage. Her adopted sister does, though, in a welcome cameo. Albeit in audio form only.
As seen in Jessica Jones, Trish Walker is the host of a radio show – which is heard at the beginning of episode six. Despite callers ringing in to label Luke as just as bad as the criminals he’s stopping, naturally, Trish makes clear her support of Luke and people like him who risk their lives to keep others safe.
In the comics, Trish herself becomes of those people when she gains powers and adopts the identity of Hellcat, something many fans want to see in Jessica Jones season 2.