You know.. some inclination that Dio was aware ..even some foreshadowing of something he said in earlier chapters would have been nice, to make it appear more natural that Dio knew about Lidusis all along..
it just seems out of place when they drop this info out of nowhere from the characters mouth
until now they've been playing it off like he really doesn't know (-_-) no suspicious glances..no nothing just
"yup totally knew about lidusis having the other half of the kings power, lets talk about it.. now that shit is going down.."
but I guess I did find it hard to believe that Dio didn't sense any of his kings power from lidusis
like come on, they spent hundreds of years together, surely he'd be able to tell..EVEN IF there was a seal suppressing/hiding it