How Dee found out about the Watchdog duty
(if I had actual time on my hands I would have fanfiction’d it better but heh I don’t have that time)
So for as long as the fag system held out for the two of them, Diedrich could never say that he saw Vincent doing anything out of the ordinary at Weston during that time.
Oh, of course, Vincent was more of a slacker for prefect’s duty than Dee was but other than that, nothing particularly stood out to Dee, besides the young Earl being incredibly annoying.
…And also the abnormal amount of letters he received from time to time.
Worst thing about these letters though, the first and only time Dee did take a look at them and noticed the peculiarity, was that either they were in a language he couldn’t decipher, or this was no real language at all and that proved to be very strange.
“These are from my sister”, Vincent answered that first and only time he noticed that Dee was acting weird about the letters he received, “we speak in code, so that bad and uptight German fags like you won’t be able to read the discussions we share as siblings.“
Obviously, Dee was offended, as with everything when it came to that annoying Phantomhive prick, so he decided to never let curiosity get the better of him with these letters and he never asked again.
[The truth behind these letters? Vincent had become the Watchdog from the moment his mother had died, but acting as the Watchdog from Weston was complicated because he couldn’t ditch the school and play hooky without people getting curious.
And if he could somehow manage until his last year, becoming a prefect had rendered the task even more difficult, which is why Frances was ensuring that work was done as per Queen Victoria’s wishes, the siblings exchanging letters in code reporting of Frances’ and Tanaka’s progress for the investigations.]
Back to Dee, proud as he was, he never asked again about these letters, but the end of the year drew near and they finally graduated (which didn’t mean that his position of a fag was over with, as opposed to everyone else and for his greatest misery), and that’s when Phantomhive offered to take the train for a little trip "as a graduation’s present”.
Needless to say that the little trip was actually about finishing the Queen’s last request at the time, through stopping a terrorist group that was supposed to blow up important political figures who were taking the same train as Vincent and Dee.
That’s how Dee finally understood what those letters were all about, amidst gunshots, blood, swords, knives, screaming and Phantomhive’s Japanese butler.
Obviously, he vomitted and yelled for a long time at Phantomhive after they barely escaped from this train alive and he ended up having to sit down when he realized that the younger man who fought alongside Tanaka was actually Phantomhive’s sister in disguise.
(ง •̀_•́)ง Welcome to the Evil Nobles, Dee! (ง •̀_•́)ง