@Kazedoom:
Nope, that was simply an AoE attack and the issue is the MC's skills.
They are support skills for party members only.
And that is an exclusive meaning of "party members" which means "only people in his party" and also "every party member except the skill's user".
So his defense support skills do not work on himself.
That is why his party members are unharmed while he got hit from the AoE attack.