The man was an innocent bystander who was simply present at the wrong place at the wrong time.
Rudy looked into his eyes and ordered, "Forget everything!"
The man's memory was wiped, and he passed out.
When Rudy teleported back home, Elena had already told Jessica and Rebecca about his powers. But she left out the major details, such as time travel and Jessica's death.
When Elena asked Rudy, "Where have you been?"
"I was worried that someone might have seen me. So I just went there to make sure my secret was safe." Rudy replied with a smile on his face.
"It's sad that we didn't get to see the sunset you were talking about," Rias muttered.
"We can see that some other day. None of us are going anywhere," Rudy shrugged.
"Umm…" Rebecca pulled Rudy's sleeves and asked, "So, who are you? You are not my father's friend, right?"
'Mom is the only person I can't reveal anything to. But I don't want to lie to her.'
Rudy smiled at Rebecca and patted her head gently.