There are a variety of spells to choose from if you'd like to be different!
Also, many of these spells will be best cast around the full moon or a waxing moon; spells that are used for gaining things are often cast now due to the moon's aid.
There are multiple Neko spells;
One for growing any ears/tail;
Even ones for Elves and Mermaids!
There are no suggestions for which ones are best, so try them out however you'd like!
If you are curious about the different kinds of mythicals, then this is the category for you: http://the-catgirls.wikia.com/wiki/Category:Mythicals
Feel free to share your knowledge! ^ - ^