I'm glad you credited me and all, but I definitely would have preferred it if you informed me before you decided to use it... Did your friend give you money to make this? Did he request that you specifically use my art to do so? If that's the case, then we have a bit of a problem. If not, then no worries this time. (Don't worry I'm not blowing steam out of my ears or anything, I just need to know.)
Nope. I've never heard from this guy. Granted, this is fan art and that has some leeway, and you credited me so I'll let it slide. But yeah, seems like it's just a lack of communication issue, rather than anything out of control... so!
No hard feelings. I'll let you do what you wish with it, and your friend may do the same... just tell him to be careful next time