Han Sen fingered the cores for a while, but he didn't make use of them. It was a risk to do so, and he didn't like committing to uncertainties. Plus, opening his tenth gene lock was only a matter of time, anyway. It wasn't worth the risk, all in all.
If there were adverse side-effects to the consumption of the Aqua Fruit cores, they could be lethal. As such, he chose to leave them be for now.
Purple Emperor was an emperor, but due to its deprivation of nutrition before birth, it lacked the power to equal others of its class.
If Han Sen gave him an Aqua Fruit, there was a chance that could be fixed, and the spirit would be as fit as a fiddle with all ten gene locks open. With an emperor like that by his side, Han Sen would have no trouble taking on and taking down Saint Fan Shelter.
He summoned Purple Emperor, peeled away the fruit, and fed him the core.
