Seme

I bear Azure seme of trefoiles, a Lions Paw in fæce, Or, armed Gules.

[…] BL manga readers chose intelligence, protectiveness, and beauty/handsomeness as the top three most important traits in a seme […]

Sebas has always been the seme.

The seme is larger, stronger, and more traditionally masculine, while the uke is smaller, weaker, and more feminine.