[@supertinyking]: Denied. Reasons are as follows:
1. 
[quote]For the sake of the RP, characters should be [b][i]at least semi-serious in tone[/i][/b]. Blatant joke characters (at my discretion) can and will be declined. In addition to that, all characters should be from pre-existing works (or, at the very least, ones with relative popularity in some regard). No original characters or what have you.[/quote]
It is very difficult to justify this character with the given appearance and lack of backstory OR personality.

2. The current cast is more inclined to take out someone who tends towards the actions you have stated here. Even putting aside the arrival of modern military to put him down (which is likely regardless of whether or not the current PCs come), it is very unlikely that the character will be anything more than a one-note villain in their eyes (and, by extension, the RP as a whole).
Doubly so given the explicit mention of casual mass murder. The characters in this world have capabilities far beyond what existed in the original work you have pulled this from (I'll touch on this issue in a moment), and pitting them together against one character will unilaterally end with a death on the other side with no casualties.

3. The source material does not apply itself well to the setting of the RP, nor does the blank-slate character you have here. Unlike Robin, who has enough personality from existing in works outside of Awakening (and even then, there remain consistent elements to be referenced from that work), this character can be summed up as a one-note villain out for blood and murder. Even if the character and their powers are scaled up, ten against one, even with mooks, is still a slaughterfest for the latter.
It works for the game, but not the RP.

That should summarize my thoughts on the matter for the moment.