We are friends who share both happiness and sadness.

My older sister is my role model.

She is my sworn elder sister, always protecting me.

My elder sister and younger brother get along very well.

My siblings get along very well.

Older sister, what are you doing today?

My elder brothers and sisters are very kind.

In physics, the wavefunction plays an important role in describing the state of particles.

He is facing difficulties with the spirit of 'もっこうにしてかんす'.

He conveyed what she said in reported speech.