Since Wangji is assigned Team Undead, what setting do we desire for them to be discussing The needs of the Children. Wrathion would be careful about hanging out with Team Undead publicly too much, since his patron is anti-Messalina and he will publicly toe the same line. Perhaps at a gladiator match, among the crowds? He cannot help who he stands next to, there's so many people. Or perhaps under cover of darkness somewhere, a sneaky catch up?