Their shards were reacting.  The entity could see how every aggressive shift in the younger one was met by an instinctual retreat in the older[Jack].  Cause and effect, invisible but there.  The nature of the shifts changed as they started speaking.

To strike the one with the mature passenger[Jack] was akin to trying to catch a leaf in the wind.  The hand moved the air which moved the leaf, and it slid just out of reach, just beyond the hand’s grasp.

Ah.  There.  A narrow miss.  The male[Jack] slid out of reach, and he prepared to go on the offensive.  His shard shifted, just as ready and able to capitalize on the weakness in offense as he was able to evade trouble in defense.

Wildbow, Worm, 26.x

“We’ll need our Black Knight[Jack], Hannah,” Partisan said.  “We bait them into a fight, then sic him on them.  He’ll be able to win as long as it’s parahumans he’s fighting.  Colin’s squad flanks and infiltrates, my squad scouts and Clarent maintains a defensive line.”

Wildbow, Worm, 29.x

“He’s… like Weaver.  Some… other power.”

“Another power?”  Tecton asked.  “People have speculated, but-”

“But… few survive meeting him.  Minor.  He… probably doesn’t know.  But… reaction too fast.  Too efficient.”

They fell silent.

“A thinker power?” Tecton asked.

Golem considered, then nodded slowly.

“I believe it,” Weaver said.  “Like me?”

“Senses things… that kind of reaction time.”

Wildbow, Worm, 26.B