I don’t quite understand how scripts work so forgive me if this isn’t doable but would you be willing to make like a winter soldier type script? From the MCU
Scripts work by giving your brain a basis to latch on to for programming! These alters will behave in very specific ways typically with a handler involved. They will do specific acts, hold specific feelings, etc.
I am not the absolute most familiar with Winter Soldier but I can do a script regardless!!
Subject is forced to adopt the identity of The Winter Soldier, an adult male being used by a government entity. The Winter Soldier may appear human but only answers to nonhuman treatments, names or pronouns. It may not have an official name, only answering to titles (The Winter Soldier, The Soldier, The Weapon, Permafrost, etc).
The Winter Soldier (WS from here on out) has very simple programming. It is a brute force weapon meant to be wielded by a skilled handler. Point it in a direction and if will follow simple commands. WS experiences shock and pain based torture, and if it disobeys an order it will then experience immediate and immense pain.
It may have code or trigger words primarily issued in German or Russian. Similar to a dog it may only follow simple commands (go, stay, sit, kill, attack, neutralize). WS could be trained or programmed to fulfill certain priorities but they must be simple to understand and its sole focus.
WS will be incredibly suspicious and possibly volatile to sourcemates, especially Steve Rogers/Captain America. It will only trust Hydra or Hydra associated individuals. WS has extreme recall programming, if a command cannot be carried out or it is jeopardized it will return to its handler and give a full report.
WS is almost fully nonverbal save for mission or status reports. Then it will tell all details exactly as they occurred, even if it could put itself in danger.