You are able to get your own Knight in WKC2, and you're even able to use it online! First, Redhorn Island needs to be available in WKC2, but you don't need to complete it. Check the guild for a quest called "Knight Moves." To complete this quest, head to the ruins at Dogma Rift and check your map for a purple circle, which will lead you to the Other World. Defeat the Ark Incorruptus and return to the guild to complete the quest. Head to Balandor Castle and talk to the researcher to finally get your own Knight. You can get more equipment for your Knight by going to rift openings in all other areas of the game. Make sure to open all the chests in each rift for nice items besides your own Knight's equipment.