Current student and soccer player for Takushoku University in Tokyo, former high school star forward Yuu Kobayashi joins Mito as a special squad member in coordination with the JFA itself. I'm not sure, but it seems to be a situation where the national organization wants him to get some professional training and playtime. There is a chance he will see action on Monday against Kashima in the Satellite League.
Interestingly his number is 35 while all numbers up to 33 were taken. Perhaps there is still room for one more.
His comment: 「チームの為に少しでも貢献できるように頑張ります。」("I'll do my best to be able to contribute even a little bit to the team.")