Subaru, the Unyielding

Whenever Subaru, the Unyielding is dealt
damage, put that many +1/+1 counters on
him.
If Emila is on the battlefield, Subaru gets +2/+2.
If Rem is on the battlefield, Subaru gets +2/+0.
If Ram is on the battlefield, Subaru gets +0/+1.
"I won't back down, no matter the obstacle."