Dear World of People Who Know Who Omi Is:
Allow me to help in the separation of fanon from canon.
Fanon: Omi is a whiny boy of angst because I KILL PEOPLE OH NOES
Canon: Omi is the leader and senior member of the group-- and not someone you want as an enemy. He kills people without feeling sorry for it, and on a regular basis. He doesn't angst about his job, in fact he never even thinks to question the morality of it until Schuldig starts toying with his oversimplified view of ethics. And in the end, he still decides that what he's doing is the right thing.
Fanon: Omi is helpless.
Canon: Omi is independent. How many teenagers keep up with school, work, act as team leader for work, and meet all their physical needs all without any help from parents?
Fanon: the cheer and bounce is a mask to hide his OMGANGST
Canon: Omi doesn't question the ethics of Weiß until Schuldig introduces the topic to him in episode 8 or 9. Omi doesn't start remembering his past until episode 7. Omi doesn't lose Ouka until episode 12. Omi has no reason to angst over this before then because it hasn't happened, and both before and after he's bright, smiling and enthusiastic with cheer. If the cheer is a mask, then what angst is he masking before any of this?
Stacey's note: Yes, he's lonely. Yes, he wants to know who he is and why he doesn't have a family. But the latter is a goal, not a trauma. The former seems to me all the more reason to be genuinely happy about being surrounded by people in school and at Koneko. There he can cheer people up with a smile and flower, hold conversations, and generally socialize with people his own age. While not able to let them in close enough to cure the loneliness, it can at least alleviate it. So, no, I don't believe either of these count as angst for the "cheer mask."
Fanon: Omi = chick with a dick
Canon: On missions, Omi is a dangerous killer without mercy for his targets. He's tough, he's focused, he runs the operations, and he gets the job done. Chick with a dick? NOT. In the Koneko and at school, Omi is cheerful but somewhat bashful, intelligent but somewhat naïve, and friendly but somewhat reflective. None of these characteristics strike me as being exclusively feminine. Are guys not allowed to be anything but super-macho and spewing ego now? I dunno, that seems kind of insulting and narrow-minded to me.
As far as physical features go, Omi doesn't look like a girl; he looks like a boy half his real age, and he tends to act about the same. That's not a chick, that's a CHILD. And a very deceptive appearance.
Fanon: He's an automatic unchangeable uke because... why? Is it because he's small, cute-faced, and has a child-like surface personality? I really don't get this one.
Canon: Omi's not even sexual within the series. He reacts uncertainly to flirts that come his way and shows no evidence of having had any experience with relationships before. He further takes a very long time to open up to people, and even then only certain types of people. (Is it just me, or isn't that a stereotypically seme tendency?)
Argh. This is why I should just avoid fandom. Did I miss anything?