I've updated my avatar. And this is the full size pic.
This time, I tried his profile for a change. Mako's profile is rather difficult...especially their ears!

Because of composition, the pic is wide and the character is bit small...The strange thing drawn with he is "hūṃ"...one of Shiddamātrikā expresses "End".
There is the story that the character symbolizes him..., rather, his special ability "烏龍月(Uryuugetsu, the power which gives END)".
There is another character "ā", which makes a pair with "hūṃ".
If so, it means sooner or later, "ā" will appear!! ...maybe☆
And, "ā" is "Origin".
Then, the person who can imagine that sooner or later, according to the situation, the character who makes a pair with Hakuu will appear, or probably his/her color will be white and he/she will have an light alignment, is probably the same type person as me W(←