Renahv often goes alone so he can do everything at his own pace, but he rarely turns down anyone joining.

Mel would accept company and Louk doesn’t care either way

Elio frequently travels alone on his journey, but it doesn't mean he won't enjoy the company of others - which he finds to be an enrichening experience. In fact, there are multiple times during his journey when he's traveling with someone - either temporary or long-term, with him and said individuals sharing the same goal(s) at the time; though it's normally one of his close friends or associates, there are certain cases where he's traveling with strangers he's just met.

Stahl doesn't travel. Arryn is never alone with her team. Avian is desperate for company to fix his lonliness but is terrified of being a burden