Theres a RPG Maker MV cheat plugin out there on the internet I dont believe I can post links but I'll try to cut it down so you guys can search for it yourselves;
github.com/ emerladCoder/ RPG-Maker-MV-Cheat-Menu-Plugin
Basically, you add the JS and CSS files to the plugin folder (www/js/plugins) and then you go back to (www/js) and open up Plugins.js, there you simply copy and paste the last line and change whatever is after "name" : to "name" : "Cheat_Menu". (Also remember to add a ,(comma) after the line you just copy pasted, otherwise it wont recognize that a new class file is to be loaded)
i hope this helps, and I hope I was semi coherent, long night with very little sleep.
The cheats are activated ingame by pressing the number 1 on your keyboard, from there a window should show up in the top left where you can cycle through the different things to cheat with (If you want corruption or affection for example, go to the Variable page, then locate the variable that controls what ever you want to change, I think for meredith its something like "meredithCorruption".
Play around with it, its much easier than trying to use CheatEngine to change variables.