Is he tho ... ? he is also a bit flawed but that's spoiler so I won't elaborate.
In a crucial moment like how it is seen before he would not pick Penelope's side (not spoiler we saw it happening already).. he was willing to off her of to save someone else that he holds dear(kids). His sympathy for her is not strong enough to convince him to switch side and support Penelope completely until much later. Reason why his affection in the previous game event/quest significantly lowered to one digit the instant he started to think she's a danger to the kids. Like it took a flash to dissolve all sympathy he had for her until he was proven wrong. Also the reason why Penelope does not trust him as much as before since she knows if she become indirectly or directly a harm to the kids, he won't hesitate to off with her. Plus having played the game she knows before hand that where Vinter's alliance lies and reason she invested on Eclis since it would take more effort and time to get Vinter to be 100% her ally.
I think out of the 5 guys, Vinter is the safest. Atleast he doesn't have that much baggage like Eclis and Callisto. I think Vinter has the safest life so far and he could also protect Penelope plus he is caring and gentle in nature (I guess)