They are Luzu, Lana, Rubius and Mangel, some Youtubers who speak Castilian, are great Luzu is Lucario, Mew is Lana, Rubius is Shaymin sky form and Mangel is Zorua.
Luzu is without pants because Rubius Mangel and smashed it with his attacks, and is in love with Lana Luzu's Boxers