I've loved reading this thread. What an interesting bunch our teen girls are! My just turned 15 yo dd is a great mixture all all of the above.
She's very attached to her phone but it's mainly to keep in contact with friends. It's become really important to her during lockdown. She uses Insta, SC, Tiktok (she just watches) and WhatsApp.
She's very devoted to her friends and seems to be chatting to someone all day. She props her phone up in the kitchen and videos herself making meals and shares with friends. Her phone is full of similar videos from friends.
She adores make up and has boxes full but only wears very minimal make up outside the house.
She wears leggings, hoodies and trainers - must be Nike. She loves Primark and New Look in person. Boohoo, Missguided and Shein online. At home she's generally in her onesie.
Her hair is long and beautiful and she takes great care of it. She has a massive collection of hair products.
She showers a lot and the bathroom is like a floral smelling sauna when she emerges.
She resists affection but if I pull her in for a quick cuddle I can feel her stiff little body relax so she obviously still likes that connection.
She can be very difficult but also very sweet. There's never really a reason for either and it can change minute by minute!
She complains a lot that our house is too small because she watches videos of teens in the USA with massive houses and bedrooms.
She still gets very excited about Christmas, Birthdays and holidays. She's currently planning the cat's Birthday party.
She spends a lot of time in her room a gets cross if we disturb her. We generally wait until she emerges or send a text if we need to communicate 
One thing though, the fashions, music opinions and obsessions change so very quickly so whatever you write will date. The things that never date are the physical changes, school pressures, the need for privacy, detachment from parents and having a 'tribe' of like minded friends.