ей стало

she began to feel

→ она
phrase Rare #37,848
she began to feel Used with an adjective or state to describe a change in how she feels; literally, “it became to her.”
RU: После разговора ей стало спокойнее.
EN: After the conversation, she felt calmer.

Ей стало страшно, и она уехала.

She got scared and left.

— Дьяволицы (1955)

Теперь ей стало немного лучше.

Now she feels a little better.

— Гудбай, Ленин! (2003)

Утром ей стало легче.

She felt better in the morning.

— Токийская повесть (1953)

Ей стало любопытно.

She became curious.

Мать посмотрела, ей стало жалко.

Her mother looked at her and felt sorry for her.

Ага, чтоб ей стало хуже?

Yeah, so she'd feel worse?

— Фантастическая женщина (2017)