|Born||Sometime during the Tribulation|
|Occupation||Worker at the Children Of The Tribulation|
|Relatives||Mr. and Mrs. Risto (parents), Kenny Bruce Williams (husband), Cameron "Buck" Williams (father-in-law), Chloe Steele Williams (mother-in-law), eight sons, six daughters, more than eighty grandchildren|
|Spiritual State||Saved during Millennial Kingdom|
|First Appearance||Kingdom Come|
Ekaterina "Kat" Williams (née Risto) was a "natural" who became a believer in Christ before her 100th birthday and a worker at the Children Of The Tribulation school during the Millennial Kingdom period in Kingdom Come. Kenny Bruce Williams was attracted to her, and the two of them became friends and lovers, even amidst some playful jealousy among his fellow Millennium Force members who called her "Kenny's Kat". However, Ekaterina had her heart broken when false information circulated about Kenny got to her about Kenny just using her but actually going out with Nicolette, a member of The Other Light. Eventually she made up with Kenny as the truth came out that Qasim Marid, who was secretly working for The Other Light, planted the false information about Kenny. They were married and had eight sons, six daughters, and more than eighty grandchildren over the next two hundred years. They both set up a Children Of The Tribulation school in Greece, operating it until they were too old to handle it themselves. Ekaterina lived to see the end of the Millennium and to enter into the "New heavens and new earth" period that followed.
In the Millennial Kingdom, she became a believer when she was eighty years old, and she was put off by some of her friends' attraction to The Other Light even before she was saved. Her mother was pregnant with her during the time of Glorious Appearing. Her parents were a part of the underground church in Greece which was ministered to by Rayford Steele and Kenny's parents during the Tribulation, and that church was always hiding from the Global Community. Every year, her parents undertook a pilgrimage from Greece to Israel for the Feast of Tabernacles and they expressed an interest to stay in Israel where the Lord now sits on the throne.
- Ekaterina is an Russian version to the name of Katherine.
- Risto is a given name in Finnish, Estonian, Macedonian and South Slavic languages, and sometimes as a surname.