Kafka - Deathlok is accepted. He seems pretty cool and I think you have a lot to work with in order to develop him and make him better. 

Masaki - Alright, so here's what I think. Based on the character and overall concept I do not think you need the wings. It's not really a Flash thing. Maybe change Yashida to something else because of you know Mariko is like dead according to the canon and stuff. Maybe for now hold off on the phasing abilities because it takes much more speed, precision and control over not only the power, but the molecules in the body. It'd be even harder for her. aside from these few things I think the character is fine. Make edits or discuss a bit more with me and you'll be accepted. 

Argetlam - I don't think there is really any edits that need to be made. So I'll simply accept you now lol. 

Knight - Alright so here's the deal. So far you seem to be the most powerful. Grant the speedster has the potential to be one of the strongest in the universe, and the symbiote is likely to be able to give you a run for your money. Regardless, I see no reason to deny you acceptance. Still as of now you are quite powerful. Our magic based characters will either enjoy each other's company or relentlessly butt heads. But overall I've known you long enough to think you'll keep in line with the power. Just don't go nuts.