She expresses her regret to the Doctor for not joining him , and after stopping PERSON@1 's plans to convert the whole of LOCATION@1 into MISC@1 children , she joins him in the ORGANIZATION@1 as a regular companion .

She expresses her regret to the Doctor for not joining him and after stopping Foster 's plans to convert the whole of LOCATION@1 into Adipose children she joins him in the ORGANIZATION@1 as a regular companion .
