Font awesome support!

groph LR A["A double quote:#quot;"] -->B["fa:fa-twitter nu springer vi"] B -->C[fa:fa-ban nu springer vi] C--> D(fa:fa-spinner); D--> E(En fa:fa-camera-retro kanske?);

sequenceDiagram Ali#45;ce->>John: Hello John, how are you? #60; John-->>Alice: Great!#quot;