Bleach 228: Don't Look Back
Bleach 519: Hot, Hot, Heat
Training together in Chapter 230
Bleach 568: Rukia's memories of Ichigo, Byakuya and Orihime
Bleach 423 Rukia petting an embarrassed Orihime
Bleach 89: Masterly! And Farewell!
Rukia and Orihime in the 7th Ending
From the Death Save the Strawberry novel