Create that second account
The first step should be to create the secondary account if you haven’t already done so. To create a secondary account, go ahead and sign out of your primary account. Click the “create an account” link and get started.

To receive emails from the second account
Next, in order to see emails sent from your secondary to your primary account, you should set up forwarding. Keep in mind that you can also forward emails from your primary to your secondary account should you want all messages from both emails in both inboxes. To set up forwarding:

1. Click the gear in the top right.
2. Select Settings.
3. Select the Forwarding and POP/IMAP tab.
4. Click Add a forwarding address in the “Forwarding” section.
5. Enter the primary email address
6. For your security, we'll send a verification to that email address.
7. Open your primary email account (signing out of the secondary account), and find the confirmation message from the Gmail team.
8. Click the verification link in that email.
9. Back in your secondary account, refresh the page.
10. Select the Forward a copy of incoming mail to option and make sure your new forwarding address is listed in the first drop-down menu.
11. In the second drop-down menu, choose what you want Gmail to do with your messages in that secondary account, such as keep Gmail’s copy in the Inbox or archive Gmail’s copy.
12. Click Save Changes at the bottom of the page.

Now, you should be able to see emails from both accounts in the same spot.

What I am actually looking for is noted below (Team accounts), or user roles. Thank you for your answer though.