[Oh, those sounds are definitely familiar and definitely getting his attention, because when one of his friends is transforming (knowing what Ian had told him about recharge times), it has to be something bad. Even though he's out of breath and his legs are aching, Souji pushes himself away from the tree and runs off in the direction of the music.
When he gets closer, Souji has to fight down the mild panic that hits him when he sees that it's Ian. The last thing they need is for Ian to be out of commission for another month. However, it's... both frustrating and a relief to see that the monsters have run off. He can already sense how upset Ian is without seeing his face.]