Proper administration of improper Libero replacement

[DTQ_Blue]

Does the libero go to RB (replace the opposite) when the next rotation occurs and the setter goes front row? If so, they would be using the libero to pass on the serve-recieve from the opposite's slot. The opposite's slot does not usually pass in the S-R from the back row, but there may be a reason the coach wants to leave the MH on the court in the back row rather than replace her with the libero. Can the MH kill from the back row? .