Dalek week- generations

Here's my entry for the last day of Dalek week.
So I didn't feel like drawing Deryn and Alek's kids or their parents or something so I drew Deryn, Alek and Bovril as 3 different generations of avatars. Roku's all serious so I made him Alek, and Deryn is carefree and enjoys flying, so she's Aang, and I wanted to make Bovril Korra just for fun. I don't know if my interpretation makes any sense but oh well.
Happy Dalek week! And many more...