Marcus and Thomas didn't get along at first due to their different personalities, but soon became good friends. Thomas originally didn't much like Marcus due to his overconfidence and his attitude into getting into fighting without a plan.
Yoshi's part job is to babysit Marcus. They often argue with each other.
Marcus and Keenan have a good brotherly relationship. He acts as a big brother to Keenan.
Tai and Marcus have two similarities. One is the fact that they both have an Agumon with digivolutions of Greymon species. The other is their strong passion and lack of sensitivity. The only difference is with the final forms. While one Agumon (Adventure) achieves his final form by combining with Gabumon (Adventure), the other Agumon (Data Squad) achieves his by mode changing in his mega form. Tai and Marcus had worked together to save Tagiru and Arresterdramon once before all the legendary heroes had come together.
Respects Tagiru's way of fighting.
|Digimon Data Squad|
|DATS Members:||Marcus Damon and Agumon | Thomas H. Norstein and Gaomon | Yoshino "Yoshi" Fujieda and Lalamon | Keenan Crier and Falcomon | Miki Kurosaki, Megumi Shirakawa, and PawnChessmon | Richard Sampson and Kudamon | Homer Yushima and Kamemon|
|Antagonists:||SaberLeomon | Gotsumon | Akihiro Kurata and Gizumon | Bio-Hybrids | Belphemon | Argomon | Royal Knights | King Drasil | Tsukasa Kagura|
| Other characters:||Spencer Damon and BanchoLeomon | Sarah Damon | Kristy Damon and Biyomon | Merukimon | Rhythm | Kosaburo Katsura and Biyomon | Yuma Kagura and Renamon | Masaki Nitta | Other characters|
|Relationships:||Marcus Damon | Thomas H. Norstein | Yoshino "Yoshi" Fujieda | Keenan Crier|
|Other media:||Ultimate Power! Activate Burst Mode!! | The Digital World in Imminent Danger! | Digimon World Data Squad | Digimon World DS | Digimon World Dawn and Dusk|
|See also:||Digimon | Digital World | Digimon Natural Ability | Data Link Digivice | Digi-Egg | List of episodes|