[Eustace had remained silent to allow the girls to speak and express themselves. He already figured out most of Lyria's thoughts, but it was Tifa who needed to hear them as well. He saw it an opportunity for them to connect with each other, and so he had let them have their space while providing Lyria some silent comfort should she need it while also casting Tifa encouraging glances and nods for her as well.

And when Tifa brings in Lyria for the hug, he smiles. ...And he does indeed catch that last part.]

She's right. It's not only just me—you can rely on Tifa, on both of us. You never have to feel you're a burden or afraid if you're bothering us... We'll be here for you.