Missing Nida Ul-Naseer is 'model student' says college
Missing teenager Nida Ul-Naseer is a model student who has made excellent progress at college, say staff.
The sixth-form student from Pill, Newport, disappeared 10 days ago with no possessions after taking out the bins at her home.
Earlier, her sister said Nida could not live without her mobile phone and constantly called and sent texts.
Naila Anwar said the 18-year-old was shy, afraid of the dark and "shared everything" with her family.
Police are speaking to friends and classmates at Coleg Gwent's Nash Road campus on Monday where Ms Ul-Naseer has been studying business.
Campus director Gary Handly said staff were "extremely concerned" at her ongoing disappearance.
"Since starting her studies at Coleg Gwent's City of Newport campus last September, she has been a model student attending all her classes and making excellent progress," he said.
"Over Christmas we used our students' union social media site to raise awareness of Nida's disappearance with Coleg Gwent students.
"Our Police Community Support Officers are at the City of Newport campus today handing out information leaflets to our returning learners as they begin a new term."
The teenager's relatives said reports of an argument had been taken out of context.
Her father Naseer Tahir told ITV's Daybreak programme on Monday: "We have some issues but only in family. Every family argues. We want to see Nida here."
Ms Anwar said: "She's very close to us. She would always share everything with us. It's out of character.
"She can't live without her phone. She just always talks to me on the phone, she texts me.
"Everything's at home: her purse, her shoes. She's not even taken her coat, nothing."
Ms Anwar repeated an appeal for anyone who could help find her sister to contact the authorities, adding: "If you know anything about Nida, just tell us."
Ms Ul-Naseer also needs medication for a medical condition which could leave her anaemic if not treated.
The family have posted a sign outside the house, which reads: "Nida, please come home. Don't worry. We are all missing you."
Her disappearance is described as "particularly out of character". Forty officers are continuing the search for her.
Gwent Police said the investigation was a priority for the force and officers were making inquires in the Spytty area.
On Saturday evening officers spent the evening in the Pill area doing a leaflet drop and talking to local people a week on from the time the teenager disappeared.
When she was last seen, she was wearing jeans and a black top.
She is of Asian-Pakistani appearance and has long dark hair, is slim and 5ft 3in (1.6m) tall.
Gwent Police have asked anyone with information to contact 101 quoting log number 448 28/12/13.