That's just up to personal preference. Tekrok's scenes and interactions are more oriented to a sub-Sabia route, but that's not the only way to play it.I just started the game today and I'm at the trial. I really have no clue which captain I should have win the trial. Out if curiosity, which one did you guys pick? Tekrok or Rokgrid? Does it even matter?
The only mostly important part is to get through the trial before the 18th day (if i remember correctly).