Does that mean that in order to earn a codename, Shiho was willing to murder as well?

It can't be. Shinichi trusts her, doesn't he? She's taken care of the children -- Ran knows she has. She fusses over Agasa-hakase, too; Ran's seen that. And that time at the docks . . .

But it's hard to reason about that when every thought feels electric, charged. When each new bit of information is a disruption, uncertainty that's hard to process.

When she's trying so hard not to be afraid.

Ran closes her eyes, tries to block it out, ask the question she really wants: "How much of the person I knew is real?"

The question is a request for some measure of certainty -- some steadiness in all that she's been given.