[He's glad that Asuna adds something in, even it momentarily traps his voice in his throat and makes it hard to stay (more or less) neutral. Mikado manages, however, after a pause.]

...And... I need to say this anyway, but I think he'd want to know. [He looks over at Asuna, and it's a different kind of pain in his gaze now.]

You've... really helped me through this, Asuna-chan. And I'm grateful. But... you've lost people, too, and I haven't been supportive enough. So...

[He threads his fingers through hers.]

...I'm sorry. And... it won't happen again.

[He won't be so closed off and unresponsive. Then again, short of losing her, too, there's no one else here whose loss would have such a crippling impact on him.]