Grimmchild

Companion NPC in Hollow Knight, summoned whenever the titular Charm (Hollow Knight) is equipped. It resembles a miniature larval version of Grimm (Hollow Knight) with Tendrils growing from its back; as the Knight (Hollow Knight) continues upgrading the charm it grows larger, deals more damage to enemies and more of its features turn from grey to red, with the tendrils turning into a set of batlike wings.