He founded AnchorWatch (UTXO based insurance company) and is sometime known as the Giggler. I've met him several times and even broke bread with him. He's a wizard with Bitcoin transactions and a joyful man to be around. He's leading a Bitcoin red team using Kimi and other high end models to scan/review load bearing Bitcoin repos for vulns and working to disseminate and patch them.

Calle is just another NVK to me, so it kinda brings down the reputation of that group. Still, maybe something good will come of it.

He was one of the most frequent guests on the NVK podcast

That's like being on the Epstein list.