[ the way she laughs as fresh tears pool in her eyes reminds him of usagi so powerfully it aches, but he's comforted by the reflections of his beloved in their daughter. truth be told, it's a blessing that mamoru's stumbled upon her as if he were drawn to these lands because chibiusa was here, for having her to ground him would prevent the reality of being without usagi from hitting him as hard as it otherwise would have. that reality has yet to sink in. ]
Isn't that what fathers are supposed to do? [ he doesn't refer to himself as her father often in spite of having been well aware of it before that fact was even acknowledged, but he feels the need to now. reaffirming that connection is important when here in kiseki, they're all each other has.
he holds her to him, patting her back soothingly as she cries, encouraging her to let it all out. there's no judgement here, not from this version of earth's prince. ]
You protected yourself. You may not have been able to help anyone then, but taking care of yourself and making sure you're around to protect them in the future is important, too.
[ mamoru's been there. powerless and at a loss for what to do, running when doing so was the only available option when you were without power to wield. he knows how discouraging it is to feel like you're unable to do anything. it's not something he ever wanted chibiusa to feel. ]