Just now everyone went to check on the little boy's condition. All is well; other monsters have reappeared, but the hound barking madly at the boy's door hasn't been revived.
Everyone felt a bit relieved.
When entering the house again, they learned from their experience and planned to take on the Silver Knights one by one. Unfortunately, apart from the one admiring the paintings, the other three Silver Knights were intrinsically linked and acted in unison. They couldn't find a way to separate them.
After dealing with the painting-admiring Silver Knight, Leon cleverly used the terrain to banish one Silver Knight downstairs via lift. The trick was to lure the Silver Knight into the lift with Leon's marathon tactic, jump out at the descending moment, throw a Black Flame Pot to push the Silver Knight out of the lift, and swiftly pull up the lever to bring up the now-empty lift.