"He was always making sure you were ok and he would organise things to keep everyone's spirits up. He was such a caring man.
"This is a very sad loss for the rugby fraternity and for our close group of friends."
Sir Bryan Williams coached Mika at Manu Samoa before he played for the All Blacks and has worked alongside him as patron of the New Zealand Barbarians club.
"He was very highly regarded. He was doing some great work certainly for the club but particularly in the secondary school area. Dylan's been very active in that area.
"He was just a great guy. A gentle big man who will be sadly missed for sure."
"He was well liked. Very well regarded. He just had a way with people."
Other friends, team mates and members of the public have taken to social media to mourn Mika's passing.
Mika played two tests for Samoa and, after serving a three-year stand-down period, seven for the All Blacks, including two against Italy and South Africa at the 1999 World Cup.
"It is with great sadness that the family of Dylan announce that he passed away suddenly and unexpectedly at his home in Auckland," his family said in a statement published on the All Blacks website.
"Dylan was a very much loved husband to Tracy, father to their daughter Marley, and dearly loved son, brother, uncle, cousin and friend.
"He was a hugely talented athlete, well respected in the Samoan community and abroad but just as importantly to his friends and family a warm wonderful caring man. Gone far too soon at the age of just 45."