Thrilling forum

Li chiamavano i tre moschettieri... invece erano quattro (1973) credited, as Lee Yang

Ming, ragazzi! (1973) credited, as Mig-Not

L'unica legge in cui credo (1976) as Zael

Il mondo dei sensi di Emy Wong (1977) as Brothel Madam.

This is Seyna's last-known role. She wore this same pink/red dress in Tabú, Flashman and Niente rose per OSS 117, so it presumably came from her own collection and seemingly lasted well.

This Italian magazine snippet says that Seyna was born in London to an English father and Hawaiian mother
However this Spanish magazine article says she was Burmese and a further press release from the magazine Girls International n.2, which mis-spells her name, lists her as appearing in a film that does not exist and says she was born in Burma to an English father and Burmese mother Thanks to Johan for finding this one

Seyna as a model

One press release says that Seyna first came to Rome with Sean Connery to publicise Dr. No, although she did not appear in the film, and liked it so much that she decided to stay. There are plenty of images online which confirm that she was indeed in Rome with Connery.

55 Days at Peking (1963) as Handmaiden of the Dowager Empress

The Road to Hong Kong (1962) as Harem girl.

Shot in Britain, a press release lists this as Seyna's film debut.

I due evasi di Sing Sing (1964) as Nightclub hostess