A 'final boss' with the bad boy aesthetic of the usual people who ended up with these sorts of reality warping devices and using them. That made perfect sense, right? Play to the tropes, play to your hopes. It was time to become not just any man, but the perfect man for this sort of thing (read: bisexual fantasy time).
Short black hair. Rectangular glasses that were just an alternate form of the remote with optical controllable holographic heads-up display to avoid anything so obvious as a remote. A respectable six inch cock and acceptably average balls. Unidentifiable anime ethnicity. A degree of reality plasticity and good fortune, for maximizing anime logical possibilities (like being a mystical sage engineer to understand this sort of device). Genius intelligence, immortal youth, retroactively updating relationships such that this had always been and was a non-issue, being gay to retain a previous interest in men (scratch that, bisexual enough that it wouldn't be an issue if something DID strike her fancy), yadda yadda.
Scenario detection rapidly enabled some useful supporting features. Transformation, indefinite (read: permanent, Haley had no intention of going back but reality process archiving is important). It was only a bit more programming and optimization of personal features before the actual transformation was set as she wanted.
Haley activated the change in existence, and everything that mattered (except her breast size, but that was an acceptable compromise for the sake of aesthetic integrity) was not loss, but gain. In a suitably dramatic magical boy transition, Haley cast off her clothes and let herself grow more masculine than androgynous, lightweight but still markedly strong. Bursts of white light, colored stars, and stylized flowery symbols accompanied Haley's grand (thankfully ribbon-uncensored) ascension into...Haley, some parts shrinking into reabsorption and others expanding with rapacious growth. She kept the name since there were guys with that name and he'd have other matters of continuity to address. A simple black outfit suitable for a college-age man popped into existence about her/him as the transformation completed...and Haley promptly threw it off to view himself in the mirror, except for the glasses concealing those dark brown eyes, which he pushed up from the bridge and confirmed some details in HUD.
"All according to keikaku." Haley's first words as a man were, staring down at his cock and balls. "Translator's note, keikaku means plan."
Memes aside, matters of gender identity and societal takeover could wait until some explorations of the physical sex. Door heavily barricaded and no pressing obligations for the day (Again, gotta avoid any dumb things happening, overlord or not!), he sat down on his bed and tentatively grasped his slightly-literally-shiny new manhood. His artstyle was richly detailed but capable of simplifying, the most elegant and natural translation of anime and the physical world around befitting of a default drawn by the unfathomable artistry of the supernatural, but the easy drawings of comedic abstraction or the arcane geometries of certain facial structures and canny limbs available at a moment's notice of space-warping speed. Stroking it just like she'd seen in the pornos, he got rock hard almost immediately, soon got a sense of the grip he wanted to use, and picked up the pace accordingly. Thoughts of future degeneracy wracking his mind, Haley went slightly more chibi and increased his arm speed, experiencing an accordingly more forceful attention to his lusts. Soon, he came. Spurts of solidly-colored cum on his chest, Haley licked up some (unsurprisingly salty) and performed an anime cutaway motion (not describable save for a sense of camera perspective and implied not necessarily real time), inexplicably cleansing the rest with the power of 'moment transition'. Lusts slaked (for now: a suitably short refractory period and suitably immense sexual stamina were included), Haley redressed himself in a flashstep and motion-blur tornado, winking a suitably bishounen sparkle at some unseen audience and so his mirror.
"Our next move: continuing." Haley remarked, flexing his arm muscles to get a better sense of his strength and speed. A 'to be continued' arrow flicked itself in and out of existence to a few riffs of a sound effect: apparently dramatic music was included with the transition graphics now.