The Spain left-back has arrived on-loan from Tottenham and is particularly happy to be reunited with former Real Madrid teammate Casemiro.
"I really have so many good memories with him," Reguilon told ICS. "A lot of games, training sessions and trips with him.
"He sent me a message on the first day when I arrived here, saying he could help me if I needed anything at all to do with the club - or the house - he said that he was here for anything I needed.
"I'm really grateful to him.
"I have so many people here who are helping me. Casemiro is one of them. It really makes you feel at home when you have people looking out for you from the very first day."
He continued: "I have always said that he is a leader on the pitch. He brings so much energy. He is so consistent.
"I think it is so important in football nowadays to have experienced players like him, who can push everyone to step up the intensity. He is a role model.
"I mean it's hard to even know where to begin when you're talking about his trophies, my goodness!"