Lian T'Su
Ensign Lian T'Su was a relief operations officer aboard the  in 2364.

T'Su relieved Data from his post as operations officer when he beamed down to Minos in order to investigate the disappearance of the . She remained at the operations station when Lieutenant junior grade Geordi La Forge took over the command of the Enterprise-D and Captain Picard also beamed down to Minos.

When the Enterprise-D faced a Minosian weapon in orbit of Minos she was among the bridge officers who transferred to the battle bridge, beside , Worf, and La Forge. Following a saucer separation the stardrive section engaged the enemy in orbit of Minos again. T'Su's orders were finding the away team and beaming them back aboard at orders of La Forge.

After a risky maneuver the battle bridge was able to destroy their enemy and beam the away team back. T'Su later reported that Doctor Beverly Crusher was out of danger in relation to her injuries. ()

Appendices

Apocrypha 
In the novel Wildfire, Book 1, she is portrayed as having risen to the rank of Captain of the  USS Orion by 2376, and dying that year when the ship was destroyed at Galvan VI.

According to the video game Star Trek: Starship Creator, Lian was born in Hong Kong to parents Li Mei and Chan T'su. She has a brother named Peter.

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Humans
Starfleet operations personnel
USS Enterprise (NCC-1701-D) personnel