Brilliant! I love this, with a possessive Severus, an oblivious Harry and it even has a cute little tokala. Niko is so adorable and a very original way to implement the old bonding theme.
I definitely like this spin and I must say your Snape isn't really all that bastardly; he's just restraint and in love with Harry. Poor Lucius though I kinda feel sorry for him.
Wonderful job! oni_butterfly is very lucky to receive this.