Beside the fact that someone as serious and stoic as Isabel could get close enough to anyone to call them a companion, a few things about her reply seemed important to Kuroda, for good or for bad. It was good that she had been willing to give him an honest and forward answer, rather than the vague, possibly evasive responses he usually got. On the other hand... "So your companion is one of the Arbiters. Someone who was close to you, possibly...doesn't that mean this mission might be too personal?" the commander asked with a serious tone, wanting to make sure he didn't have anyone on his team who could ruin this with some move for revenge.