。
She is very kind to me.
Literal
She [topic-は] me [to-に] very kind is.
親切 ('kind, considerate') is the standard na-adjective for warmth and helpfulness toward others. Note the dative に marking the recipient of the kindness — Japanese marks who is being kind-to with に, parallel to 私に厳しい ('strict toward me'). The structure [topic]は[recipient]に[na-adj]だ is a productive way to describe attitudes and dispositions targeted at someone: 私に親切だ (kind to me), 子供に厳しい (strict with children), 学生に優しい (gentle with students).