Choose Rolanni's Companion

Steve and I usually have a Traveling Companion with us on trips.  For the upcoming book tour, I have three veteran Companions to choose from, but I'm having trouble deciding who to bring.

Should it be. . .

Hassan the Assassin?


Harwil the platypus?


Or. . .


Sly Fox?

Vote below!  Feel free to discuss the merits of each in Comments.

[Poll #1939838]