You had always known that Ken was ultraman. And it really had never bothered You. It never put a strain on your relationship either, You would just kind of learn to go with the flow at some point despite the initial shock. The thing that threw you for a loop was when he came in late one night after Gigantron had been killed by the KDF, with a baby kaiju that has imprinted on him

"Listen, I don't know what happened! She's just here now, and I dont-" Ken is cut off by the baby kaiju (Emi) waddling over to you