Q. What role is needed to access Analytics?
A. The same roles users are assigned in Lifecycle automatically allows access to Analytics.
Note: A role/access change made in Lifecycle does not immediately update in Analytics. The background datamart process has to run before that would change in Analytics. That process begins nightly sometime after midnight Eastern time.
Once the datamart/ETL process runs, the data (including any role changes) from Lifecycle is pushed to Analytics. So essentially any changes done on any given day in Lifecycle, will appear in Analytics the following day.