When Kusu and Kasso had observed each other face-to-face at close range in the Sacred World of the Kais in Universe 7, she had discovered that Kasso possessed a very unusual power.
It seemed to have been hidden by someone.
Not even the Supreme Kai of Time had noticed this, because Kasso had been on Earth at the time, concealed by Popo.
After Kasso left Earth for the Sacred World of the Kais, without Popo there to conceal it on the spot, Kusu, as the eldest of the angels, vaguely detected it.
As for what kind of power it was, she had no way of knowing.
When Kusu rewound time, she found that a version of Kasso had been standing beside the Supreme Kai of Time and had used some kind of technique.
Zamasu had been erased, while Gowasu and Rumsshi, whose strength was below the fifth level of the Divine Realm, had forgotten Zamasu entirely!
Putting these two points together!
One could infer that the technique Kasso used had been Temporal Erasure!
Then the power Kasso possessed was the power of time and space!
Able to remain by the Supreme Kai of Time's side while also wielding the power of time and space, there was only one truth!!
Kasso's identity was that of a candidate Supreme Kai of Time!
Whis: "?"
After all that speculation, she had only guessed that he was a candidate Supreme Kai of Time?
"Miss Kusu, may I ask why you came to see Kasso?" Beerus asked cautiously.
He had also thought that Kusu had learned Kasso's identity.
Kusu pursed her lips and smiled faintly. "It's nothing. I simply wanted to meet this exceptionally gifted young man!"
She did not know why Zamasu had been erased, but since Zamasu had even alarmed the Supreme Kai