Small update! Finally found a file reader for my computer to read .js files in a way I can actually parse and maneuver, and extracted all 608,000 or so characters pertaining to Fisi from the TiTS public build. Now to parse them down into more easily readable/digestible scenes, and I'll be able to properly study the writing style, characterization, and how I may need to parse things to fit player descriptions. Progress!
Collecting mine and others' thoughts so far, some scenes I definitely plan to attempt to write so far are: revelation of relationship to friend group, new hangouts and/or edits to existing hangouts to acknowledge relationship, cat cafe/kaithrit maid-boy cafe mix-up date, parental confrontation allowing Fisi to tell her parents off and regain confidence, asking into possibility of allowing repeats of previous dates instead of being one-offs (likely may need to edit details/dialogue that implies singular-instance nature).
Potential avenues for expanded content: introducing Fisi to player's children (either generic by species or limited to named children or named mothers), additional interaction with Isis (possible acquiring physical form? building body for tech specialists buying for others), meeting siblings scenes if accepting Fisi as a lover.
Long-term possibilities and/or needing input from active authors/coders: Fisianna pregnancy (limited to one or two named children) with scenes for interacting with child(ren) based on age(s), possible interactions with deck 13 robots to acquire a mid-low level drone for attack or defense, helping integrate Hand-So into your ship (would need to study Hand-So and their writing more first), Gianna interaction (maybe intellectual convo about AI sentience? idk, just a thought for now but idk if there's much bite to it), potential end-game hiring Fisi at Steele-Tech (dating the CEO of an unpredictably expanding company that went from mining to also doing so much more might make it harder to freelance individual contracts with other companies if ST has the potential to branch into AI as well lol).
Definitive no's: No Fisi body-modding/tf's, no Bess/Ben interaction (I know my limits lol, I will not be tackling any JimT characters until I'm more confident in my writing, and I'm certainly not going to ask a coder to tackle that mess of spaghetti even though I love Bess myself), no crew recruitment.
That about wraps things up for now, will update either when I finish the analyzing and begin writing, or if any more replies hit this post with ideas that catch my eye and imagination!