Lethe attacks, not the enemy this time, but the grenade itself; the force of her attack blows it back towards its source, a power struggle that keeps the thing in the air somewhere between them, now gaining ground, now losing.

She can't do this for long without leaving herself vulnerable to the other creatures.

She's certain these aren't senshi, but there is a very slight chance they still have star seeds; all life in her world does: each planet and star, each person, each senshi. So when she finally abruptly releases her power from the grenade, she raises her arms with her bracelets - and aims them at her foe. Golden lights shoot from them, ready to extract the star seed, if it has one.