These headcanons are about Arcane version of Piltover's Finest.
Probably Part 1. If I'll make more parts, I'll link this to them.
1. It's very hard for Vi to open up but once she does it's full of tears and snot and hugging and crying herself to sleep in the safety of Caitlyn's arms.
2. I'm taking show's Vi height as canon (and it's been confirmed Cait is 6ft tall and Vi is half a head shorter than her). Not all buff ladies need to be tall. A small buff with tall femme is a nice change!
3. Considering Powder was most likely 7 when we last seen her in act 1 it looks like over 10 years has passed and Vi spent all of them in prison. It also means Vi is probably in the middle of her 20's (24-26). Caitlyn is a bit older (28-30) imo. Powder is 17-19. And YES, I know what one of the writers had said but it makes no sense and she also said they left a lot up to interpretation. Vi did tell Cait her lil sis was able to do parkour when she was 7 and we could've seen her struggle in act 1 so IMO she was 7 back then.
4. Yes, Vi was beating the bad guys in prison but she never killed anyone and she was also tortured there. We can see her being terrified of being beaten up again by the guards when the door to her cell are opening up. She's also surprised to see Caitlyn standing there again. In time, she develops at least some sort of PTSD - she's afraid of being locked up in small places, she's afraid of a clicking noise similar to the one warden's cane was making.
5. Caitlyn knows Vi is innocent and was put to prison for either a cover up or as a scape goat. Once she learns Marcus did it she's trying to figure out why and who else was involved. She'll make them pay.
6. Vi is touch starved but she's afraid of showing it. She's also scared of being vulnerable in front of other people. After some time the only person she allows to see this side is Caitlyn. And with time Vi starts initiating hugs and cuddles by curling herself up in Cait's arms whenever she feels she wants it.
7. Vi is having nightmares. Sometimes they're so bad she ends up having a panic attack.
8. Caitlyn falls in love with Zaun's food after she tries a few things from there. It's greasy and unhealthy but so delicious...
9. Vi is impulsive and easily to get angry but one touch from Caitlyn can melt her down and stop from doing anything stupid.
10. Caitlyn was in a a few short relationships before. Even with a man who her parents wanted to see as their daughter's husband. She liked him but that's it. There was no love. And political marriage was not her interest so she forced things to end. Her mother figured out she likes girls afterwards. She never had any problem with this. Her father didn't either.
11. Cait is a top. Vi is a touch starved bottom who loves to cuddle. She's terrified of spooning though. She needs to have Caitlyn in front of her and she usually naps/sleeps on her chest listening to her heartbeat (boobs are a great pillow) or at least with her head on Cait's lap. It's because she used to sleep with her back touching a cold cell's wall for all those years in prison and spooning reminds her of it too much. Vi also sleeps quite a lot although not in the meaning of length because she wakes up from nightmares quite often. She's also often taking naps during the day as well. And she's not a morning person.
12. Vi doesn’t know a lot of food, especially sweets, fruits and veggies. Caitlyn is more than happy to introduce her to all the goodies.
13. Vi is actually quite shy. She has a lot of game, yes. But when it comes to serious things she’s all shy and doesn’t know how to act, react or speak too much. If Caitlyn kissed her in the "you’re hot, cupcake" scene Vi would've combust.
14. Vi loves to play with Caitlyn's long hair. It reminds her of her mother which she one day, shyly, admits. She loves when Caitlyn is playing with her hair too. It's relaxing.
15. Vi not only has a good heart. She also has a huge heart. She's full of empathy and understanding. But if someone messes with her loved ones or people she cares about, this person is in huge trouble.
16. Vi easily gets emotional in tender moments. She cried the first time she and Caitlyn made love because the feeling of safety, love, tenderness and intimacy was overwhelming for her. After years of playing a strong person and emotional, intimate neglect, she can finally let go and be the one that is taken care of too and the feeling of it is always relieving for her.
17. Vi is very soft actually. But she's not showing it just to anyone. Caitlyn, Jinx and kids are exception. Kids love her because she's one of those adults who play with them and she's really having fun while doing it. She is, after all, a child who never grew up properly so her childish side is still hidden deep within her.
18. Vi has no idea what are things like bank account or salary. Caitlyn teaches her about it.
19. Vi hates cold, she despises winter. It reminds her of prison and childhood in Zaun where was no central heating etc. Caitlyn is slowly warming her up to liking this season with hot chocolate, cocoa, mulled wine, napping in front of the fireplace and gingerbread.
20. Vi is afraid of small, dark places, especially rooms without windows (elevators included). They remind her of the prison cell.
21. Caitlyn is experienced in the intimate stuff. Vi never had anyone close like this in her life. She has no sexual experience at all.
22. Vi is blaming herself for everything that happened and is still happening due to Jinx actions. She really took what Jinx said to the heart "Silco did not make Jinx, you did." Caitlyn is patiently talking with about it, explaining she's not to blame and had no way of knowing all of it would ever happen. Slowly, Vi is starting to believe it.
23. Vi is afraid of storms. They were dangerous in Zaun (acid rain etc) and then in Stillwater whenever one was happening she could feel the walls shake. They also remind her of shooting and bombing the bridge at the time her parents were killed.
24. Caitlyn heard everything Vi and Jinx were talking about at the tea party until she was knocked out. It pissed her off to hear how Vi suffered in prison and how Jinx blames her for becoming Jinx.
25. Caitlyn was a grat friend with sheriff Grayson. She taught young Kiramman how to shoot and had a huge influence on her to wanting to become the enforcer and then a new sheriff.
26. Vi isn't a good reader. She knows some basics but she's not capable of reading longer texts. There were no schools in Zaun. She does like when Caitlyn reads to her though and in time she does learn but still enjoys Cait to read to her in the evenings when she's laying with her head on enforcer's lap.