Frinos is a swamp frog familiar that specializes in defense and survivability. Base ability increases Melinoe's maximum HP and boosts healing received from recovery items — reducing deaths caused by chip damage accumulation.

On rank-up, the healing bonus multiplies, and at the final rank a one-time death prevention effect activates when HP would reach zero. Excellent insurance in late-game stages with heavy sustained damage.

Passive ability: minor auto-healing when moving between rooms, quietly improving endurance across longer runs.

Best for players struggling with survival in the early-to-mid game. A reliable second familiar after Gale, especially when HP-based deaths are the primary failure cause.

Synergizes well with Aphrodite healing boons, Hestia DoT builds, and tanky Sister's Blade setups. Becomes significantly more valuable under high Heat conditions.

A dependable, practical survivability pick. Not flashy, but consistently reduces death rates. An ideal long-term companion for players pushing Heat levels and prioritizing sustained endurance over maximum damage output.