Honestly, Ruby has done some questionable/odd things lately, but think emailing her school to go back to give a talk sums up absolutely everything wrong with her and all her worst traits rolled into one.
First, it's the inability to let go of her past and clinging onto childhood. She was Head Girl, probably felt a sense of importance at school, especially compared to university where you don't get constant validation and praise, so she's going back to an environment where she got that in bucketloads. She left school in 2018. That's 4 years ago and the fact she hasn't moved on isn't just worrying, it's incredibly weird. I'm sure most of us enjoyed school and have fond memories there, but I for one have no ambition to go back as that chapter of my life has closed and I'm sure teachers would find it weird if after graduating I'm still clinging onto the past and trying to relive my schooldays.
Second, it's the blatant narcissism. She wasn't contacted; she emailed asking to give a talk on Shakespeare. Who does she think she is? What qualifications does she have to give a talk? They've only invited her back out of a combination of pity and because she's a YouTuber/probably has a decent amount of funding and has "status" as an alumni. She knows that and is using her school to boost her ego. She's done a few modules on Shakespeare where she piggybacks off other people's work. That doesn't make you capable of giving a talk, Ruby.
Hoped she would have grown in a gap year and get some more independence, but living at home with mummy and daddy doing everything for her and now going back to school? Could be a worse regression than we thought. Next step is dressing up in one of those checked school summer dresses and playing with a doll's house. Her parents need to seriously intervene.