Sammy's three children as of the present in Teamverse canon, fathered by him to three of his past lovers/amicable ex-girlfriends. If you're wondering why he hasn't had a kid with Melanie, she's been purposefully made infertile since childhood by her mother. For good reason, because both Alice and Melanie would prefer the Soulweaver Witch bloodline to end with Melanie, for everyone's sake... but I digress

They're all part Oshawott/Mew in some way through Sammy, because the retroactive ascenscion of his mother also passed down the divine genetics at least slightly. They live alternatingly with either their respective mothers, or with Sam's neighbor Toni, under the guise of being Toni's wards that Sammy helps take care of.

Agnes and Tomas are thus unaware of their nieces and nephew and assume they're kids of other residents of Ramenji, but Sam's notoriously bad at lying to his surrogate dad Kai. Though Kai seems to not have confronted Sam about the subterfuge.

Saya, the oldest and child of Sammy and  cottoncanyon's Cotton, is a rough-and-tumble scrapper with a fondess for exploration and sticks that are vaguely sword-like in proportion.

Tana, child of Sammy and  Torrenttbolt's Shirley, is a green thumb like her mother and prefers growing plants and cooking to kendo any day of the week. Her soups could use some direction but the spirit is there.

Tsubasa, child of Sammy and  bittenhard's Shinju, is the youngest. He mostly follows Saya and Tana's leads in terms of doing stuff, and finds ninja media fascinating. He's fond of watching Tomas and Agnes spar in the Ironworks backyard.

If you couldn't tell (Saya, kaTANA, TSUBAsa), Sammy has a habit of theme naming. Specifically, sword theming. Granted his full name is Masamune Masamune so it's... fitting.