[Yuui has to press the palm of his hand against his lips to keep any sound from escaping. He doesn't want to startle the poor thing more than he already has, no matter how adorable he things it is.]

[He sits down in the grass next to it but makes no move to remove the leaf it's hiding behind.]

Hello there. I'm sorry, we didn't mean to startle you. [He activates his warp band so that the Eevee will be able to understand him while doing his best to empathically exude calm and general good will.] Any chance I could convince you to come out from under there? I have food.