In episode 08 of Soul Eater! Not:
Eternal Feather is hospitalized and Stein createds a clone of her to mess with the girls. Her braid comes to life...
and leaves a message on the bedsheets:
Jesús Navas seems to be a soccer player for Manchester City. I don't follow football myself, but he doesn't seem to be particularly of note or any influence on Japanese pop culture.
Is this the person Soul Eater! Not is referring to? Why is it relevant?