Yes, our bettas flare at themselves ( Jacquitaz is my mum! Her name is Jacqui and i am Michelle and my dog that sadly had to be put to sleep but i will NEVER forget was Taz

.......that's the reason behind our names)
To help you get an insight into their world one night when it is dark, open the curtains and switch off the light, you will see your reflection.
Yes none of our bettas have been in cups, poor Spot was in a tank with Tetras that can be terrible fin nippers. He was hiding behind the heater for safety and everytime he came out they went for him. Heartbreaking to see. So i bought him without a second thought then shot off to a cheaper store to buy him a tank!! That was a crazy day, only went out for lunch with my parents on my day off from work.
They may not be in cups but they are still , sadly, not treated well enough. Flame and Honey (RIP) were alone in 8 gallon tanks but the rest in mixed tanks.