Disclaimer: I own nothing but rather owe everything to JKR. No commercial success needed, thus none intended.
A/N: This takes place at the Ministry of Magic, a few hours after the Battle of Hogwarts (DH).
The Oath of Percival Weasley
'Will you, Percival Ignatius Weasley, withdraw your resignation from your Ministry position?' the tall black man asked in a deep, slow voice.
'I will' the red-haired, freckled younger man ostentatiously answered, his bespactecled blue eyes firmly on the face of his vis-à-vis. A small, red and golden flame came from the wand of the third, middle-aged man standing beside them.
'And will you further serve the Ministry in whatever position they will find suitable?' Shacklebolt continued.
'I will' Percy agreed. A second flame went out of the other man's wand, intrepidly entwining with the first one.
'And will you fight for the values of fairness, empathy and participation for all your lifetime?' the older man solicitously concluded.
Another 'I will' from Percy followed. A third flame appeared and complexly interweaved with the other two blazes. Then the fiery network narrowed to the linked hands of the two men and connected them in a very special way.
Kingsley broke his grip, and the red and golden flares died down.
'You're oath-bound now, Percy, by an Unbreakable Vow'
'Yes, Minister, I understand that very well.' Percy nodded.
'Hence I promote you Undersecretary in charge of my personal assistant.' Kingsley declared.
'Thank you for your confidence!' Percy bowed slightly. 'What's first, sir?'
'Write to Harry. Confirm his heritage. Then we'll have a meeting with your father '– he thought for a moment, then nodded at the other man – 'you, Mr Williamson, Mr Croaker, Ms Hopkirk and whoever you see fit for a position as a Head of Department.'
'Harry as well?'
'Nope' Shacklebolt shook his head. 'He's too young. But Hermione Granger would be a good choice – she's wise beyond her years. In her case, July would be a good time to ask her. Give the kids some rest!' He grinned at Percy.
'Of course, Minister. Consider it done.' With this Percy darted off down the corridor to his office.
'Wait, Percy' Kingsley called him back.
'Yes Minister?'
'And set the trial versus Malfoy next week.'
'I'll do so' Percy said and disappeared in direction to his office.
On his way to his own office, Kingsley saw something lying on the floor which resembled very much a pearl necklace.
'Dark magic still around' he sighed and flicked his wand at the nearest paper bin, labelling it:
'Safe disposal of Dark items'
Then he charmed the bin and magicked the necklace into it. The bin quavered ferociously and emitted an exploding belch together with a huge dark-blue flame erupting from it. Shacklebolt sighed again. 'So much dark magic, I'd never had thought they were capable to cast it on simple Muggle items' he mumbled. He labelled the bin once more, the second sign saying:
'Keep distance while in use'