User blog comment:AdmiralPedro1stFleet/Squadmates in ME3 I'd like/@comment-3228423-20120401051256/@comment-1407247-20120402180436

EDI (on the Collector Cruiser) and Mordin establish that each 'Collector' drone no longer has the capacities of a full individual - they've been indoctrinated, cloned, re-purposed, and completely replaced by tech to the point they lack any qualities of sentience, and barely qualify as 'living'.

With this in mind, the only way Cerberus could instil any form of personality into this Collector drone shell is a VI, or worse (in universe lore), and AI. Unless they suddenly figured out how to transplant a consciousness into another body (a la Portal 2), which while not established as impossible (and certainly plausibly unethical enough for them) is extremely unlikely given they could create an entire robotic army with the savvy and thinking of organics.

Fanfic characters are heavily predisposed to Mary Sue-ism. Whilst in some parts a compelling idea, unfortunately this is starting to get into that territory - a Collector drone who was conveniently recovered in a conveniently viable state by Cerberus, conveniently given a level of freedom of will, with a conveniently severed link from its sole-intended 'user' (and so its sole purpose and 'construction) whilst also conveniently possessing/retaining capabilities that wouldn't normally be available to it due to convenient timing of said severance, and was conveniently 'revived' into a fit fighting state by being given a conveniently available personality matrix/consciousness or conveniently retaining sufficient autonomy whose original presence was doubtful (by lore). Said drone is then conveniently accepted by Shepard and crew to bear arms, let alone reside on the same ship.

There's certainly elements that could make a good yet fitting character, but it bears too much favouritism in its current incarnation.