Andrei, Markus and Zhang with a poison drinking MC
Note: I have been watching The apothecary dairies and I am just curious in general if Vampire are completly fine qith poison and such things. MC is experimental and obsessed with poison like MaoMao in the anime.
Andrei
He would be very worried
He may have many many years on his back but he never once though of consuming poison on the base of an experiment
He is constantly worried
Always have one of his Gols on look out
Like a petowner making sure their pet doesn't eat something they shouldn't
Since in constant watch MC doesn't have any opportunity to test poison
Markus
He would look at you weirdly but yet he is also intrigued by the idea
He wouldn't really stop MC
Instead he would try some himself if its interesting enough
While MC is doing it for sience (if you could call that)
Markus is doing it for fun
Also he would gladly help MC getting more guine pigs and the poison themself
Zhang
Zhang is in the middle of Andrei and Markus
He is worried but not opposed
He is also somewhat interested but not enough to do it himself
He will be observing you if you do try something
Get some information from Andrei if it's even safe