ей стало

she began to feel

→ она
phrase Rare #40,907
she began to feel Used in impersonal constructions to describe a change in how she feels or perceives something. The following adjective or adverb gives the specific feeling or condition, such as ей стало лучше (she began to feel better) or ей стало страшно (she became scared).
RU: Ей стало холодно, и она надела куртку.
EN: She began to feel cold, so she put on a jacket.

Теперь ей стало немного лучше.

Now she feels a little better.

— Гудбай, Ленин! (2003)

Ей стало страшно, и она уехала.

She got scared and left.

— Дьяволицы (1955)

Утром ей стало легче.

She felt better in the morning.

— Токийская повесть (1953)

Ей стало любопытно.

She became curious.

Ага, чтоб ей стало хуже?

Yeah, so she'd feel worse?

— Фантастическая женщина (2017)