Enough of them to be annoying - but there are only so many of us.

[As their numbers dwindle, they'll have less and less that they need to look out for. ...which is kind of a macabre way of thinking about it, but it is what it is.]

Whoever acted today - we can conclude it was someone who liked you and Jae-ha well enough to save the pair of you.

[...

Or someone who disliked Sousei enough to annoy him by pairing him with Jae-ha, but. She doesn't actually think Jae-ha's that bad......]