"As she ended her life, to think how she would have missed her mum and dad and her family. My heart aches so much."
The floor leader of the ruling Saenuri Party, Yoo Seung-min, was met by furious parents when he tried to join a memorial service at the port and was escorted away, a reflection of the anger towards the government of President Park Geun-hye over its handling of the disaster.
The Sewol set off on April 15 last year from Incheon, west of Seoul, for a routine overnight voyage to the holiday island of Jeju with 476 people on board.
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The ferry, later found to have been structurally unsound and overloaded, capsized when it made a sharp turn in the waters off the southwestern island of Jindo. Many of the children followed instructions to stay in their cabins as the crew scrambled to safety.
The chief engineer was convicted of homicide and jailed for 30 years after South Korea's worst sea disaster in decades. Fourteen surviving crew members, including the captain, were jailed for between five and 36 years for negligence.
Heartrending stories emerged of children tying their life jackets together, of fingernails torn of children trying to climb out of the sinking hull and of pupils joking it felt like the Titanic as the ferry began to list.
More than 300 people died in the disaster, with the bodies of nine still missing.
The government is expected to decide soon to raise the vessel, with the hope of finding the remains of the nine.
"We believe the ship must be raised," said Park Eun-kyung, whose niece, Huh Da-yun, is missing. "We are certain she is inside the ship. We just have to take her out."