I thought this was very wonderful.
The very idea of viewing someone from so many different aspects is something I find very interesting.
I was fond of your use of language. The only thing I could suggest changing is the last line of the third stanza.
That reads awkwardly.
Also, the third stanza and fourth stanza are kind of blended in what it has to say, where as the first two are separate.
Stanza 1- Brother
2-Twin
3-Friend/thief
4-Thief
And then in the fifth they are all listed separately.
I was mindful of it, but that's the only thing I could see.
Keep writing! =)