You can create a “blue” character style and build a GREP style into any paragraph style that needs the blue V. If you have multiple styles where this occurs, they’ll each need to have the GREP style built in (unless they are all based on one style, then you just need to change it in the parent style). Also, if you have another character style applied already, it won’t work (one char style allowed). You could also do a find/change if that’s easier. And for that you could just use the text field, since you know which specific character you need to change…Find: V and Change formatting: blue character style.