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What if the 1st elder was Raizel's brother, there's way too much use of those blood stones in the Union. Wasn't there a mention before where Raizel's brother was the previous noblesse and he was executed because he used the blood stones? What if he's still alive?! O_O
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He can't possibly be Raizel's brother because the traitors said that Rai didn't have enough power (life force) since his fight with his brother and Muzaka. So, it must be someone related to him or perhaps your are right. But we won't know until we have more information regarding the matter. Besides, who likes to reveal the final boss in the climax? No one.
Is that the reason why he refused?
I think so .......
It's ok. Guy, girl. Panda goddess doesn't care as long as she gets her lover. ヽ(`Д´)ノ