AFP - A second Bangladeshi twin is waking "slowly" and should be conscious later, three days after being separated from her conjoined sister in Australia, a hospital official said Friday.

Krishna was said to be in good condition but is expected to make a slower recovery than her sister, Trishna, who has awoken from her induced coma and is talking but remains in intensive care.

"She's still asleep, she's being woken slowly," a spokeswoman for Melbourne's Royal Children's Hospital told AFP, adding Krishna would "probably" be awake later.

"She's got no dramas but they're taking it slowly with her," she said.

Doctors are already hailing this week's high-risk operation to separate the two-year-olds' connected heads as a success after they came through healthy and brain scans were clear.

A team of specialists worked for 32 hours on Monday and Tuesday to divide the girls' skulls, brains and blood vessels in a procedure that took two years of planning and preparatory operations.

Atom Rahman, the joint guardian who helped rescue the dying girls from a Dhaka orphanage, said Trishna was "100 percent perfect" after she woke up on Thursday.

"I just said hello and she was doing the same thing with her arm (that she always does).... I just knew she was 100 percent perfect," he said.