We're actually very friendly to fancels here when 
people honestly put effort into making sure the 
images aren't copies of other cels. . . And we 
especially like fancels when the artist puts a 
lot of time and effort into making an original 
drawing of the character!! ^_^

That looks like a beautiful cel! ^_^

But although no one has gotten in trouble, it is 
technically illegal to sell fancels since the 
fancel artist does not own the character they are 
painting. But it isn't enforced by anyone (not as 
of now) and I think it won't be so long as people 
act responsibly. . . And it sounds like you are 
acting responsibly. *^_^*

After showing that beautiful Sesshoumaru cel, I 
am sure people will now start to ask you if you 
take on commissions. ^_~~

Many Sharp Smiles,
--Drac