No problem Kristina,
One thing, I completely missed in your first pics.."the shavings". I would suggest you get rid of them. Replace with old towels instead. The shavings can get lodged in their crop and resin based woods, like cedar and pine, are also not recommended around birds.
Sapphire Moon, likely the actions of your friends bird comes from a lack of chew and play toys to stimulate his activities. Try having the person who has been "victimized" by all the chewing, offer some simple chew toys (rope, safe woods, paper towels, toilet paper tubes, etc....different colors also helps), and have him(her) play with the bird a little more often. Definitely don't underestimate the intelligence of these birds. They can have very long memories particularly if there was some sort of trauma.
Hope this helps