Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Character | Portrayed by | Relationship | First appearance | Last appearance |
| --- | --- | --- | --- | --- |
| Reed Garrett | Kyle Gallner | Son of Mac Taylor's late wife | "Consequences" | "Pot of Gold" |
| Rikki Sandoval | Jacqueline Piñol | Neighbor of Danny Messer | "Child's Play" | "Personal Foul" |
| Samantha Flack | Kathleen Munroe | Sister of Don Flack | "Veritas" | "Misconceptions" |
| Terrence Davis | Nelly | Informant of Don Flack | "Turbulence" | "Cuckoo's Nest" |
| Ellie Danville | Sydney Park | Adopted daughter of Jo Danville | "Do Not Pass Go" | "2,918 Miles" |
| Russ Josephson | David James Elliott | Ex-husband of Jo Danville | "To What End?" | "Identity Crisis" |
| Claire Conrad Taylor | Jaime Ray Newman | Late wife of Mac Taylor | "Indelible" | "Near Death" |
Question:
How many characters were portrayed by the informant of don flack?
Answer:
1.0