Jirachi saw as Celebi entered.

“Ew.”

Jirachi is a kind and all-loving Pokémon. She is always there to help others and wrong those who have sinned. As shown when she interacts with both Victini and Celebi (though thats just personal beef) on-screen. She is also against wrongdoings, as they don't like it when Darkrai claims they did something bad by fighting Celebi.