More tidbits of the mysterious Excalibur's life :3

He once had a family with a wife (Borealis) who supported him through everything when he felt like giving up on everything, and soon he would have 4 pufflets. Until the day of the kirin war came, as he fought off the threats (which were other species and opposing kirin elements) he heard a scream which he knew was Borealis', next thing he knew Borealis was dead and their eggs destroyed, he blames the other species for this but little does he know it was his own king who did this in all the confusion of the battle....
...

Excalibur had this as a secret cuz his king felt like he was going to quit the guard and he didn't want him to, but the secret was deeper than that, only Excalibur and his close friend Jerboa knew of this secret....

What was it? Look at their tails-