を胸に

with [something] in one’s heart

→ を
phrase Rare #30,756
with [something] in one’s heart Used with feelings, hopes, or memories that someone cherishes or keeps close as they move forward.
JA: 我々は期待を胸に旅立った。
EN: We set off with hope in our hearts.

私かぐやとの思い出を胸に前に進むよ!

I’ll carry my memories of Kaguya in my heart and keep moving forward!

— Cosmic Princess Kaguya! (2026)

燃えるような情熱を胸に

With a burning passion in my heart

— Demon Slayer -Kimetsu no Yaiba- The Movie: Mugen Train (2020)

我々は期待を胸に旅立った。

We set off with high hopes.