During a walk in the city you just reached, with Undyne at your side, your Vaporeon, you found a small fountain to water the Pokémon.

Undyne stopped right under the faucet, looking at you with her dark blue eyes, waiting for you to turn on the water to cool her down a bit.

Undyne knows perfectly well that you will understand what she wants from you, you have a bond strong enough to allow you to understand her without her making a sound.