The brother is confusing this "playboy aura" with being confident. People who are confident in themselves and their identity are more approachable as they don't let so many outside issues affect their inner self. Being confident, kind, and understanding is a great quality in a person.
Read the missing chapters. There was some pretty big growth and backstory from the characters. Not something that should be skipped. Definitely should buy the volumes or read it somewhere else before going forward.