A Commons deputy speaker's daughter, who died suddenly, was keen to serve her community, the local council said.
Natalie Lewis-Hoyle, 28, died at her home in Heybridge, near Maldon, Essex, on Friday.
Her parents, Chorley MP Lindsay Hoyle and Maldon councillor Miriam Lewis have appealed for information about her final hours.
Heybridge Parish Council, where she was a councillor, said she connected with local people.
Miss Lewis-Hoyle had been a member of Heybridge Parish Council for about a year.
The chairman, Simon Burwood, said: "She was such a livewire - our youngest councillor by quite a long way - and she really connected with people."
"She had such a good manner, such a good way about her, a fantastic smile," Mr Burwood said.
"She was quite happy to challenge the status quo and to ask the questions that other people might have not so readily wanted done so."
Nigel Blunt, vice principal at her former school, The Plume School, said she would always "give her time" and contributed to school projects.
Labour MP Mr Hoyle said the family was "truly devastated" by the death.
Ms Lewis said on Facebook it was with "unbearable sadness" she had to announce the sudden death of her "beautiful, much-adored daughter Natalie".
"Natalie is my only child, my mini-me. Please help me find out what happened to her in the hours before her death," she said.
The family said Miss Lewis-Hoyle's phone was missing and may have been left on a train from London to Clacton on Thursday night.
Essex Police said the death was being treated as not suspicious.
- 17 December 2017