Based on the provided information, the question "Who is the thickest person in BTS?" is ambiguous, as "thickest" can be interpreted in different ways. The reference data focuses on weight. Therefore, the question is interpreted to mean "Who is the heaviest member of BTS?".
BTS Member Weight
| Member | Weight (approx) |
|---|---|
| Jungkook | 70 kg |
According to the provided reference, Jungkook is the heaviest member of BTS, weighing approximately 70 kg as of March 8, 2020. Therefore, if "thickest" is interpreted to mean "heaviest", the answer is Jungkook.
