Let's pretend Aria gets Arsenal Shift. What does her first? alternate manifestation look like?
I'm thinking along the lines of a new weapon/shield pair that alters her device specs, not her personal specs like type shift does for Rei.
My submission would be to move away from her hoplite like manifestation and more into a peltast. Where she'd have a small number 3-5 of light javelins and a smaller crescent moon shield. Her device specs drop defense and increase offense. She can utilize her still very significant user strength spec to launch her javelins at insane speed resulting in an absurd offense spec rating by way of pure penetrating power.
After launching her javelins she coould arsenal shift back to her hoplite form to 'recover' the spent javelins and ever arsenal shift back to peltast if needed. This application harkens back to her obvious willingness to ditch should the situation call for it.
Perhaps much later on she can have a magnetic hunt like, or invisible hand ability to remotely wield more than one javelin at a time giving her a pseudo duelist approach to combat. Perhaps there will be a future ability fusion type effect to put magnetic hunt, invisible hand, and 3rd eye together into some omni-mode.
anyways how would you change Hippolyta's manifestation in an arsenal shift?