"I..." Ianto said, trailing off, trying to find some way to organize his thoughts and explain himself. "I feel like I should be calling you Hikaru. I'm just. I'm not sure that I could switch over. It's...it's weird. I... To think of me talking to you and being like 'So, Hikaru, would you like some coffee prepared correctly this time, now that we've got milk,' I. It's just weird. I mean, you're used to me calling you Sulu, and I'm used to it too, but..."

He trailed off again, turning to look down at Sulu again. "You're really alright with the fact that I'm referring to you by your surname even though you...you've brought me back from the dead. You're offering to switch around your work schedule to spend time with me while...while I'm like this. I. I just want to make sure that, y'know. That this is alright, I guess is what I mean to say. That we're alright..." Not just about the name, but in all ways. As much as they could be, of course, considering.