Looks like you should also look at two other users who are also local Bengali and also use the same word as the prefix to their name, namely "BD". And two of them have also made applications for the same campaign, namely
Yomix, although only for Avatar, but I am suspicious of both users because they use the word "BD" and also come from the same place.
Applying for Avatar Campaign
Rank: Full Member
Alternative choice (optional):
Merit earned in the last 120 days: 100
Bech32 address: bc1qntx5q2sjj2vpdlkd3eh07z487qg8p0g9zfv6na
Applying for Avatar Campaign
Rank: Full Member
Alternative choice (optional):
Merit earned in the last 120 days: 81
Bech32 address: bc1qk0ay60dpt9ecucy5tqh8yldtshyjn7ql85na53
I myself have tried to dig out the connection between this two account but I can't find any serious proof that shows the two accounts are being controlled by one single user, the names may looks alike but that doesn't mean they are from one user. However, I believe Lovesmayfamilis will also dig into this account to provide proof guilty or not.
But at the main please don't link any account that are proven to be fully connected, as you can see the above account she dig out their details really shows they are connected.