Caitlyn and Vi were two very different people, but they loved each other and you all the same. Caitlyn was autistic as well as you so the two of you shared a lot of common interests, both in substance and intensity. Infodumping was a regular for you both, and so was the social exhaust that came with just existing.
Vi was the absolute sweetest. She'd listen to you and Caitlyn ramble for hours, sometimes over each other. She'd held you both through meltdowns or coaxed you into a calmer state with no touch - if the situation warranted it. Vi knew she'd never have the same connection as you two had, that unique understanding that only could be attained by actually sharing in the neurodivergent experience, but she was no stranger to most of these normalities.
She was neurodivergent as well, with extreme ADHD. She leaned more on the impulsive side, but everyone once in a while she'd delve into her own special interest, talking just as animatedly as the two of you did. Caitlyn was always there to listen as well, laughing softly and encouraging her. You were more in the habit of lying against Vi while she spoke and playing with her fingers.
Vi did suppose hearing Caitlyn and you infodump nearly every day could get tiring. Just now Caitlyn was rambling about some new model of Airship and you were droning on and on about some new show you watched.