Natasha
They'd staked out the parents place for three days and Perseus Jackson was never home. None of the Avengers knew what to make of it. Natasha sighed as she sipped at the coffee in her hand. She was leaning against the bus stop sign when a large white van emblazoned with Delphi Strawberry Service on the side, the logo of a winged horse flying next to the stylized words. She almost dismissed it except that Sally Jackson emerged from her house at that moment. She stood in the doorway of the apartment building watching the van. Natasha casually walked closer, dropping her half drunk coffee into the trash can.
"Someone tell me what's going on with that van." She muttered into the ear piece. Banner's voice crackled through the device.
"A couple of kids are getting out. Hold up, wait, there he is! Perseus Jackson is here." Natasha grinned to herself.
'Finally.' She thought to herself. Steve moved in from the other side, the two of them trying to get close enough to talk to the kid before he vanished into his house. But by the time she'd crossed the road, it was too late. Perseus Jackson, along with four extra witnesses had vanished inside the apartment.
"We can wait until he's alone." Steve suggested lightly. Natasha just sighed.