Ravi is known to be a super over protective and loving brother. He even cried when she suprised him one day:
In a recent interview he was asked if he'd be okay with Ji Won dating a member of VIXX and he said no way! There are better guys out there for her haha!
He also added that if she had to date anyone, it just really can't be Ken because he's "innocent like a baby" and she needs a strong personality!