To be honest to me it seems like you practically giving away a big chunk of your company for free. Person B doesn't seem important at all at this moment, and se

To be honest to me it seems like you practically giving away a big chunk of your company for free. Person B doesn't seem important at all at this moment, and seems like the relationship is partly based on friendship. Was this a friend you let into your business just because you think you need a cofounder? Person C seems of utmost importance in comparison to Person B, but still seems like she's not required at the moment. I made the same mistake once when I was younger, but luckily everything got thrashed and I started again by myself involving other people only when it was really necessary. tl;dr: Only add cofounders when you're sure your really need them, and only then assess the risk and their involvement as a measure for equity.