On google's BigTable, if my entities belong to the same Entity Group (parent), will the entities be fully consistent?

Question

I have started learning about Eventual Consistency. My entities on google's BigTable belong to specific Entity Groups (parents) to support transactionality.

My question is: if my entities belong to the correct Entity Groups, and if I do reads/updates in a Transaction, will Reads be fully consistent? (as opposed to Eventually Consistent?)