Konsole accounts are tied to a single person, and cannot be shared between multiple people. Anyone that is required to sign a document on their own behalf requires their own unique Konsole account.
Because your Konsole account can be used to sign documents, it's a lot like your signature. And just like your signature, it needs to be unique to you so that you can prove you're the one that signed a document.
When signing physically, the handwriting of your signature can be anaylsed to ensure that it is a match to a known signature, and it's not all that different when signing digitally. Instead of assessing the handwriting of the signature, digital metadata associated with the electronic signature can be assessed (for example, the email address of the signing account or the IP address and geographic location of the device that did the signing) to ensure that the person who signed the document is the intended signatory.
Konsole accounts for people under age 18
While young children do not require a Konsole account, when they reach the age where they are required to sign off on documents on their own behalf they will require their own account.* For families that want to ensure all Konsole notifications go to a single email address for the accounts of all members of their family, see this article about setting up your account notification preferences.
* The age at which a child must sign documents for themselves varies by institution and document type, and your adviser will provide specific guidence on this where required.