Well this is a poem, but is that all right?
This poem reminds of Kaname, yuki and Zero.
THREE TINGS TO REMEMBER
A Robin Redbreast in a cage,
Puts all heaven in rage.
A skylark wounded on the wing
Doth make a cherub cease to sing.
He who shall hurt the little wren
Shall never be beloved by men.
In the first part it is mentioned a Robin Redbreast in a cage. A robin is a pure being: gentle, harmless and weaker than most of the other animals. A robin is also supposed to be free. This reminds me of Kaname who wants to put Yuki in a cage. And Yuki wants to be free because she is like a little bird (butterfly?).
In the last part its written: Puts all heaven in a rage. Then I think of how angry everyone will get if Yuki is abused by Kaname. Especially Zero and Yuki herself.
In the second part it is still about a bird. But this time it is not a robin, but a skylark. When I hear this part I think of Kaname hurting (killing?) Zero (Zero is the Skylark). And how this will make Yuki, who is the cherub (a cherub is a type of angel mentioned in the Bible) sad. If Kaname hurt Zero in any way he would make Yuki very sad (and angry?) and Im very sure she would not sing or be happy for a long time.
The last part is also about a bird, this time it is a wren (a wren is very small and defenseless bird). And he who shall hurt the little wren could be Kaname. If Kaname hurt someone little and defenseless like a wren, Yuki would hate him (and everyone else: men=Mankind). Or is the wren more like Kaname hurting Yuki?
I hope you all liked the poem of William Blake