"I am rather curious... Your world's Swords of Justice have vanished... and you were close from what you say... Do you miss them...? Lying awake, thinking of where they might be now, remembering the time spent together...? Do you even wonder what might've happened, had you joined them that day...?"

Even though Eph's memory, for the most part, is a blank slate, there's a great deal of empathy for them, even if they are only subconsciously aware of it.

*Keldeo seemed to dwell on the mew’s question for a moment before answering. Their expression was less of sorrow and more of a bittersweet acceptance.*

Keldeo: Yes, I do miss them very much, and I cherish the wonderful memories I have of them.