A shield is always useful for blocking enemy ranged units and during sieges. To do so, talk to them 'I wish to ask you something' - 'I want you to train your soldiers according to the customs of my kingdom'.
Note that until today, I didn't realize I could go past 8 companions, even with balanced relationships, and I had assumed that was the maximum number of companions for a 'stable' party. In game terms, each of the companions in Nova Aetas is just one … This is a new feature added to be able to recruit special troops. A bow and arrows uses two slots, but gives more projectiles compared to throwing weapons. Sora is a noblewoman many Bannerlord players like to marry for her high Steward skill of 160.
Ask to 'know about them' or ask to 'see their equipment' to change these options, respectively. If you're not sure how to equip companions, our For more Mount & Blade II: Bannerlord guides, take a look at our Mount & Blade II: Bannerlord is the eagerly awaited sequel to the acclaimed medieval combat simulator and role-playing game Mount & Blade: Warband. For further information about the companion, like their special recruiting template, check each companion's page. Join one of the numerous knighthood orders or create your own. But note that kings will very often reject truce or goodwill regardless of Persuasion level, even if the skill is at 10, as the circumstance takes a larger importance.