Here's a short go at the Takamichi one...
Shiro Takamichi put away the ledger with a sigh. While he could track the finances of the cafe on a computer, he never had been comfortable with technology.
Besides, there was a certain comfort in doing it 'by hand', even if it took longer. Stretching, he could hear his joints cracking and felt the sharp aches and pains and he made a face. Long years of abuse had taken their toll, both in scars and in less... visible pains.
He wondered sometimes about his daughter though. She had become more... not distant, but secretive, ever since she brought home that cute ferret. While he himself hadn't really had the ability, maybe she did?
He shook his head and laughed. No, the ability remained unexpressed without a teacher, and he hadn't seen any signs of someone from the magic country around. His senses had dulled somewhat from disuse, but there was a certain resonance about those who lived in that curious alter-world that could be detected.
Besides, if someone got close enough to Nanoha to teach her magic, they'd probably have found him. He rather regretted not changing his last name when he took his leave of the school and the world he'd lived in for so long, but he'd felt at the time that changing his appearance and first name would be sufficient.
Poor Negi-kun... he'd probably had quite a difficult time after the 'incident'. It was more the fault of the stiff-necked old men who'd decided that he was too much a danger to the "veil of secrecy that keeps our worlds apart". Hah! They'd just been frightened of a change in the status quo.
Once Negi had, like his father, gone into hiding (and several of his students had vanished after him), attention was turned to... other targets. There were rumblings in the ranks of mages, and after all the effort spent to make the Thousand Master's song the focus was wasted, a new scapegoat was needed... fast. And there he was, a close associate of both Springfields, a member of the Crimson Wing, and not even a 'real' mage.
So he too had left Mahora, warned by Konoe and half a step ahead of the capture team. The principal was safe enough; he had significant political clout and Mahora was HIS home ground. Eishun, while also one of Nagi's comrades, was also safe for similar reasons. And the rest of the Crimson Wing was either dead or in hiding.
He'd done a few stints as a bodyguard and one one job had fallen in love with his charge. They'd married, he retired from bodyguarding, they opened up a cafe, and focused on raising a family. And that, he thought, was that.
But lately there'd been some... odd disturbances. Like there was magic in the air around the town, but... strange, alien. A couple of mysterious "gas explosions" and the like, some odd rumors that most laughed off. And coupled with Nanoha's behavior... maybe he should investigate.