に particle used with noun


ユキは空気を読まない傾向 **に** あるからな

Why is に used above rather then が? I'd thought that when に is used with a noun
(in this case 傾向), it indicates something is in the noun (in this case,
something is in 傾向), which doesn't make sense

Second example: 私が勝つ **に** 決まってるけどな

Why is に used instead of が. To me, に sounds like "decided in victory", which
doesn't makes sense




> ユキは空気を読まない傾向にあるからな
>
> Why is に used above rather then が? I'd thought that when に is used with a
> noun (in this case 傾向), it indicates something is in the noun (in this case,
> something is in 傾向), which doesn't make sense

Yes it does make sense, it's about positioning them within the "trend" towards
being out of the loop.

> Second example: 私の勝つに決まっているけどな
>
> Why is に used instead of が. To me, に sounds like "decided in victory", which
> doesn't makes sense

Perhaps you already noticed, since you asked about nouns, but is probably 私の勝
**ち** not 勝 **つ** there. にきまっている is a set phrase which you can just learn, it
means "no doubt" or "it is certain".

