1. He's a violent asshole who lashes out when things don't go his way...which like....things will def be up and down. There's even a plot in the works for him to take a lover/maybe have a foal....and Milo could be instrumental in getting Cal outcasted just before he dies!
Also, he can beat up Cal at some point too. Maybe learn from Cal's evilness/how Cal covered up his weakness...idk. BUT the advantages are that, so long as his overall plot isn't effed up TOO much you can do with him what you will really. lol.