transform oneself ((into))
- 彼女は化粧をするとすっかり変身する
- She looks 「completely different [like another person] with makeup on.
- おとぎ話ではよく動物が人間に変身する
- In fairy tales animals very often transform themselves into human beings.
- ほとんどの人は変身願望を抱いている
- Most of us wish we could be someone different.