This calls for a "narcissism" tag.
Or maybe there's an hidden explanation regarding Kirakishou.

so she got a nose bleed looking at herself int he mirror?

One might not realize how hot the really are until they strip down or at least wear a bikini and look at themselves in a mirror... this might be a little to much though.

and whats with the paper ball in her eye socket?

It's... supposed to be a rose. >.>;;

lol, This shouldn't be weird, Kira is just creepy that way XD.

In that case, why is there a rose in her eye socket?

A yes, the surprise of looking at the mirror everything and
seeing a devilishly beautiful person looking back.
*looks in the mirror*
Gasp!
Who is the handsome fellow in my mirror! He's looking right at me! So perfect! So beautiful! Is he a demon trying to take my soul?! Who are you? You beau-
*>> Fast forwarding to a few hours later*
Such nice eyes, and such beautiful hair! Oh wait; THAT IS ME!
Ahahaha-
*Gets shot by somebody*

You ruined it all.

Insurgencey said:
In that case, why is there a rose in her eye socket?

Go read Rozen Maiden. :/

...i just love this one

actually, the rozen dolls can use mirrors or reflective surface to talk to other dolls or view scenes involving them. So she may have seen one of the other dolls in an indecent act.

Kira's so sexy that she gets horny from looking at herself.